TECHNICAL

Let’s get an overview of technical information on stainless steel BSP threaded fittings.

All our BSP threaded fittings are manufactured to standard ISO 9001:2008. All thread ends conform to standard Din 2999 and ISO 228/1.

Investment casted and stainless steel 316 grade, these are suitable for all environments including marine purposes.

Standard Pressure Rating on most BSP threaded fittings is 150lbs (150PSI / 10Bar).

Female threaded fittings have a parallel BSP thread and male threaded fittings have a tapered BSP thread.

Typical industry applications for stainless steel BSP threaded fittings include food and beverage services, irrigation and pumping, petrochemical, geothermal, marine, agriculture and machinery, automotive and civil services.

Different types of tube bends can be referred to by more than one title in New Zealand. It’s important to know the difference between short, medium, long and extra-long tube bends, which can be mistaken for determining the radius of the bend.

The medium bend is the largest seller and is a standard bend across most industries. Other bend types may be used in expanded or condensed situations and to align with existing process lines.

SHORT BEND

• Short radius
• No leg (with exception to 1 1/4″)

MEDIUM BEND – UNI

• Short radius (same as the Short Bend)
• 30-40mm straight leg each end
• Also known as a UNI type bend
• Most commonly used

LONG BEND – NZ

• Long radius
• 30-40mm straight leg each end
• Also known as a NZ type bend

EXTRA LONG BEND

• Long radius (same as the Long Bend)
• 30-125mm straight leg each end

Example:

A= Bend length
B= Bend leg
R= Radius

All the applicable schedule pipe fittings are manufactured to standard ASME B16.

Schedule pipe typically has a welded seam and is therefore technically non-sanitary. The process to manufacture schedule pipe is referred to as hot rolling which implies rolling stainless steel at high temperatures to form into the desired shape. As the stainless steel cools down the metal can naturally contract, therefore accuracy is difficult to control.

The term NB (Nominal Bore) is often used interchangeably with NPS (Nominal Pipe Size). ‘Nominal’ is a non-dimensional number that identifies the hole diameter. The wall thickness of pipe is determined by the schedule. Pipe fittings are available from The Metal Company in Schedule 10S and Schedule 40S. In the engineering industry, this can also be written or referred to as ‘SCH10’ or ‘S10’ and ‘SCH40’ or ‘S40’.

The Metal Company stock a range of schedule pipe fittings including 45° & 90° bends, concentric & eccentric reducers, end caps, tees, sockolets and threadolets.

Aside from the pipe fittings range, The Metal Company offers professional schedule pipe fabrication and BSP threading. We have nominated welders able to create customised fittings, providing you with a quick and easy installation on site. Customisation can include extended barrel nipples, extended weld nipples and female BSP threading.

Typical industry applications for schedule pipe and fittings include transporting fluids, gases, drainage & services, irrigation, pumping, petrochemical, geothermal, marine, agriculture and on machinery.

Stocking stainless steel ANSI Class 3000 (3,000 lbs pressure rating) O’lets are available from The Metal Company in both BSP threaded and socket style to suit schedule pipe sizes.

These are used to connect pipe at a 90° angle. After drilling a hole in the pipe, these fittings can straddle the pipe to cover the hole and be welded in place.

A sockolet has a socket into which pipe can be inserted. A threadolet has a female BSP internal thread into which a male BSP external thread can be inserted.

RJT is an acronym for Ring Joint Type. RJT unions are often referred to as a standard sanitary union. They comprise of a stepped seal which leaves a small crevice where the liner and male part of the union overlap. RJT unions are very popular for frequently dismantled sections of pipework. The Metal Company stock RJT union in sizes ½”, ¾” and 1¼” which are uncommon in New Zealand.

Watch Vernon below who will show and tell you how RJT Unions work and what they consist of.

Watch Huntley explain in the informative video below all about DIN Unions

We often get asked for an RJT DIN union. Although DIN may look similar to an RJT union, it has different specifications and the fittings cannot be used together.

RJT is an acronym for Ring Joint Type. RJT unions are often referred to as a standard sanitary union. They comprise of a stepped seal which leaves a small crevice where the liner and male part of the union overlap. RJT fittings are common in New Zealand and are made to suit imperial (inch) tube sizes.

DIN is an acronym for Deutsche Industrial Norm. Originally from Germany, the DIN union is used to connect or access pumps, machinery and processing lines. DIN fittings are common in European countries and are made to suit DN (Diameter Nominal) tube sizes.

What is DIN Inch?

Firstly, let’s explain ‘DIN’. The DIN union is commonly used to connect or access pumps, machinery and processing lines. DIN fittings are scarce in New Zealand and Australia, generally speaking they belong to Europe. Even so, Kiwis and Aussies have been known to use DIN fittings on various contraptions like pumps, imported machines and process equipment.

However DIN fittings only suit DN (Diameter Nominal) tube sizes. This becomes a problem for countries that use imperial (inch) tube because DIN fittings are unable to fit suitably to imperial sizes and DN tube can be difficult to source.

For this reason, The Metal Company developed the DIN Inch Male Part and the DIN Inch Weld Liner which both consist of a DIN union that connects to imperial tube sizes. This is New Zealand and Australia’s answer to European fittings.

DIN Inch fittings can be used with a standard DIN Slotted Nut and DIN Seal.

The RJT C Spanner is suitable for both RJT slotted nuts and DIN slotted nuts from 1” (25.4) to 4” (101.6) sizes. The C Spanner has a hooked spanner function either end of the tool and is able to tighten and release an RJT slotted nut by applying pressure in a lever action.

C Spanners by The Metal Company are manufactured from stainless steel grade 316, making them suitable for multiple applications including marine environments and nearly all corrosive materials.

Getting the correct Camlock type can be tricky, yet it doesn’t need to be. It is time to name things for what they are and list a basic overview of each Camlock.

TYPES OF CAMLOCKS & ACCESSORIES

Type A: This has a male coupler end and a female BSP thread end.

Type B: This has a female coupler end and a male BSP thread end.

Type C: This has a female coupler end and a barbed hosetail end.

Type D: This has a female coupler end and a female BSP thread end.

Type E: This has a male coupler end and a barbed hosetail end.

Type F: This has a male coupler end and a male BSP thread end.

Type TM: This has a male coupler end and a butt weld end to suit imperial tube.

Type TF: This has a female coupler end and a butt weld end to suit imperial tube.

Type DC: A Dust Cap (DC). This is an end cap with a female coupler.

Type DP: A Dust Plug (DP). This is an end plug with a male coupler.

ACCESSORIES

Camlock Handles: Handles to suit female couplers. Sold per pair.

Camlock Pins: Pins hold camlock handles in place on female couplers. Sold per pair.

Camlock Rings & R Clips: Rings and R Clips attach to camlock handles and assist opening and closing handles. Rings can also be used for locking handles in position. Set includes 1x Ring and 1x R Clip.

Camlock Gasket: Gaskets are seated at the connection point of female couplers to seal the camlock union.

Connecting with clients for better efficiency is part of The Metal Company culture. It’s called connection perfection.

A core range of adapters have been developed by The Metal Company to make installation quick, easy, and cost effective. The Weld Nipple Adapter and Weld Socket Adapter are ideal for connecting stainless steel imperial tube to a BSP thread. Meanwhile, you can also adapt from a BSP thread to RJT, Tri Clover or Press-Fit connections with just one fitting.

BSP adapters include the following options:

• BSP male nipple to butt-weld tube connection (Code Prefix: SWNA)
• BSP female socket to butt-weld tube connection (Code Prefix: SWSA)
• BSP male nipple to Tri Clover ferrule (Code Prefix: SWNAFER)
• BSP female socket to Tri Clover ferrule (Code Prefix: SWSAFER)
• BSP male nipple to RJT male part (Code Prefix: SWNAMP)
• BSP male nipple to RJT weld liner and hex nut (Code Prefix: SWNAWL)
• BSP male nipple to Press-Fit connection (Code Prefix: UMA)
• BSP female socket to Press-Fit connection (Code Prefix: UFA)

Sizing of tube is based on the outside diameter (OD) and wall thickness (gauge of the tubing).
This is mostly used in imperial sizes (based on inches) in New Zealand.

The Inline Non Return Valve is a check type valve which is spring actioned for flow control. As the name indicates, an Inline Non Return Valve is able to be clamped in the centre of a Tri Clover union or RJT union. This creates a quick and simple way to access your valve by disassembling the union.

These valves are friction fitted with the assistance of two O-ring seals which allows the valve to sit securely in position. It also allows easy removal of the valve from the union, rather than welding a valve in for permanent use.

Mini Ball Valves are commonly used for domestic water services, heating & air-conditioning plants and compressed air systems. The slimline design and butterfly style handle are beneficial on smaller sized process lines or for saving space in condensed situations in comparison to standard 2pc or 3pc Ball Valves.

The Metal Company stock Mini Ball Valves with the full valve body, ball and stem in stainless steel grade 316, rather than a mix of stainless and nickel-plated or chrome-plated brass materials which are supplied elsewhere in the industry. The Mini Ball Valves have an EPDM O-ring seal that can process liquids from -40°C and up to 120°C.

Available with Female-Female, Male-Female or Male-Male BSP threaded ends and stocked in sizes 1/4″, 3/8″ and 1/2″ with a reduced port.

On the outside, the Gate Valve and Glove Valve look similar. Yet on the inside, they function completely different.

THE GATE VALVE
The Gate Valve is a unidirectional valve (flow can be either way) and houses a vertical ‘gate’ which determines the volume of flow passing through it. They are designed as an on-off function to isolate or connect fluid, but flow can be restricted or stopped completely by winding the handwheel at different levels.

THE GLOVE VALVE
The Globe Valve is a directional valve (one direction of flow) and consists of a movable disk-type plug that closes against a horizontal seat to regulate the flow passing through. Due to the horizontal seat configuration, the Globe Valve restricts the fluid flow significantly even when in fully open position in comparison to the Gate Valve.

Both valves are supplied by The Metal Company in stainless steel grade 316, have an aluminium handwheel, a maximum pressure of 1000PSI / 69Bar and are suitable for water, oil and gas (known as W.O.G.).

Some valves are ‘non-return’, which means the flow is directional (one direction of flow) and is able to stop the fluid from returning through the valve the opposite way.

Generally, the valve will have a gate with a hinge or spring which closes off the bore. When flow pressure is applied, the gate opens in the direction of flow.

Included in our BSP non-return valve range is the 2pc Spring Check Valve, 3pc Spring Check Valve, Swing Check Valve and Piston Check Valve.

Aside from BSP threaded valves, Sanitary Non Return Valves are available to suit dairy tube and union fittings.

The range of flange types have been developed in various countries determined by the configuration and the pressure capabilities. The Metal Company stock the common flange types, including the following:

• Table E – ASME B16.5 – Tasman thickness
• PN 10 – BS 4504 – Tasman thickness
• PN 16 – BS 4504 – Tasman thickness
• ANSI 150 – ASME B16.5 – Tasman thickness

In this range you will find Tube Flanges, Pipe Flanges, BSP Threaded Flanges, Backup Flanges (also known as Backing Rings), Tube Neck Rings and Blind Flanges. Flanges are available in various sizes to suit imperial tube, schedule pipe and spiral welded tube.

The standard flange range features the following:

• Stainless steel grade 316
• Lightweight* (also known as Tasman thickness)
• Flat faced (FF)
• Slip on (SO)

Aside from the standard range, The Metal Company can source or manufacture most flange types within New Zealand or internationally. BSP threading and fabrication services are available for customisation to your requirements, including female BSP threaded flanges and custom flange drilling and welding to stainless steel fittings.

Typical industry applications include irrigation, pumping, petrochemical, geothermal, marine and food & beverage process lines.

*Although flanges are regarded as ‘Lightweight’, the flange thickness may not be light weight (thinner) than specified for some flange types.

The stainless steel Expansion Flange is technically not in the typical flange family. The purpose designed is to secure tube or piping in wall, floor and ceiling penetrations.

Commonly used in food or beverage plants, cool stores or any applications where a waterproof hygienic seal is required. The design allows for lineal expansion and contraction of pipework whilst preventing ingress or liquid to penetrate.

Flange sizes available can accommodate imperial, nominal bore, and metric tube sizes. Non-standard tube diameters can be adapted by adding a custom rubber liner.

MEASURING A STANDARD FLANGE

It’s important to get the correct flange. Measure your flange using the guide below and review the measurements of flanges available from The Metal Company to see what corresponds exactly. One of the most important measurements is the Pitch Circle Diameter (PCD) which can determine if the flange bolt holes will match each other.

A: INSIDE DIAMETER
Measure across the centre from one side of the internal hole to the opposite side of the hole.

B: OUTSIDE DIAMETER
Measure across the centre from the external edge to the other external edge of the flange.

C: PITCH CIRCLE DIAMETER (PCD)
Measure from centre of the bolt hole to centre of the opposite bolt hole. This can also be measured from the external edge of the bolt hole to the internal edge of the opposite bolt hole.

D: HOLE SIZE
Measure from edge to edge, across the centre of a bolt hole. This will generally be slightly larger than the metric bolt being used.

E: THICKNESS
Measure from one edge of the flat face to the other.

What is the difference between a clamp and a saddle style clamp?

Clamps are stocked from sizes 1″(25.4) to 4″ (101.6) and sizes less than 1″ and more than 4″ are stocked as a saddle*.

Clamps are hinged to save space for pipe works in condensed situations, however they are replaced with a saddle in smaller sizes where the hinge becomes unfeasible and in larger sizes where the saddle provides a stronger solution

CLAMPS:

• 1x Bolt
• Hinged one side
• Can be separated
• Unique design

SADDLES:

• 2x Bolts
• Bolted either side
• Can be separated

*Parameters may differ depending on the tube the clamp is suited to. Some sizes are stocked in a heavy-duty option.

Bossed clamps are hinged to save space for pipe works in condensed situations, however they are replaced with a saddle in smaller sizes where the hinge becomes unfeasible and in larger sizes where the saddle provides a stronger solution.

Standard bossed clamps and bossed saddles feature a 10mm metric female threaded boss in the centre of one clamp half. The boss allows pipework to be secured from a machine, floor, wall or ceiling by threading 10mm Metric Threaded Rod to a Bossed Wall Plate.

For added strength, a 12mm Metric Boss can be welded to a Plain Clamp or Plain Saddle and 12mm Metric Threaded Rod used for securing in place.

For example:

Aside from bossed clamps and saddles, pipework can be connected with a Collar Clamp which allows a 5/8” or 16mm Round Bar to be fitted inside a collar or by welding Round Bar directly to a Plain Clamp.

TUBE

• Sanitary (AS 1528.1)
• Cold Rolled
• Measured by outside diameter (OD)

Tube is commonly used for a wide range of purposes including food & beverage process lines, irrigation, pumping, petrochemical, geothermal, marine, agriculture and machinery, automotive, architecture and heat exchange.

Sizing is based on the outside diameter (OD) and wall thickness (gauge) of the tubing.

SCHEDULE PIPE

• Non-sanitary
• Hot Rolled
• Measured by nominal bore (NB)

Pipe is commonly used for a wide range of purposes including, transporting fluids, gases, drainage & services, irrigation, pumping, petrochemical, geothermal, marine, agriculture and machinery.

The term NB (Nominal Bore) is often used interchangeably with NPS (Nominal Pipe Size). ‘Nominal’ is a non-dimensional number that identifies the hole diameter.

The wall thickness of pipe is determined by the schedule. In the engineering industry, this can also be written to as ‘SCH10’ or ‘S10’ for Schedule 10S and as ‘SCH40’ or ‘S40’ for Schedule 40S. To ensure correct supply, always specify at least 2 dimensions you require: Outside diameter, inside diameter, or wall thickness.

Got it?

Let’s recap:

Spiral welded tube is created using a process where a continuous full penetration MIG (metal inert gas) weld overlay is used to create tube in a spiral pattern. Typical industry applications include HVAC / refrigeration, geothermal, liquid transfer, waste water, irrigation and pumping.

Our spiral welded tube and fittings are manufactured to internal dimensions. This means sizing is based on the internal diameter and wall thickness (gauge) of the tubing. All our spiral welded stainless steel tube is manufactured from high quality coil conforming to ASTM: A240.

The Metal Company stock a range of fittings to suit spiral welded tube, including 45° & 90° bends, tees, concentric reducers, caps, saddle clamps and flanges & accessories.

Aside from the standard range, The Metal Company can source or manufacture various spiral welded tube and fittings within New Zealand or internationally. Options available on indent include spiral welded tube and fittings in stainless steel grade 316, spiral welded tube up to 8 metres in length and spiral welded tube and fittings in sizes up to 24”.

Typical industry applications for the Press-Fit system include heating & cooling systems, water systems, compressed air & inert gas systems, closed circuit sprinkler systems and oil & diesel lines. Press-Fit can benefit installers through reliability, efficiency, quality, safety, labour saving and consistent workmanship.

RELIABILITY

The Press-Fit system is designed for use with M profile press jaws. Pressing tools have inbuilt safety features to ensure each press is the same every time, no uncertainty of weld integrity.

EFFICIENCY

The speed of the Press-Fit system will amaze you. A competent tradesman can install a Press Fit tube and fittings without the need of qualified welders.

QUALITY

The Press-Fit system uses metric size fittings and tube which is made to standard EN10217-7 and EN10312. The stainless steel grade 316L (low carbon) is used for Press-Fit products, which means it is highly corrosion resistant and suitable for nearly all environments.

The Press-Fit system can be used for potable water when using grade 316L stainless steel. This certifies the product complies with the plumbing code and the relevant standards.

The standard O-rings seals, made of black EPDM, are resistant to ageing, heat and chemicals.

SAFETY

• No naked flame
• No hot work permits
• No gas bottles
• No fire hazards
• No heavy installation equipment
• Makes it easier to comply with requirements

LABOUR SAVING

Fewer less installation hours on site. Up to 50% reduced labour costs and lower skilled tradesman required to carry out the installation.

CONSISTENCY

Every connection is uniform throughout the installation, ensuring good connection quality and no worrying about reworking of installations due to inconsistency.

The Metal Company stock a range of metric tube sizes and Press-Fit fittings to suit, including 45° & 90° Elbows and Spiggots, Adapters (to suit BSP, RJT & Tri Clover fittings), Couplers, Reducing Fittings, Tees, Clamps, Mac Unions and Weld Joints.

Other fittings and sizes are available on indent.

The Press-Fit system uses metric size fittings and tube which is made to standard EN10217-7 and EN10312. The stainless steel grade 316L (low carbon) is used for Press-Fit products which means it is highly corrosion resistant.

The Press-Fit system can be used for potable water when using stainless steel grade 316L. This certifies that the product complies with the plumbing code and the relevant standards.

GENERAL APPLICATION

The stainless steel system is the ideal solution for drinking water systems as the 316L stainless steel used is completely hygienic and highly corrosion resistant. For general applications, the standard O-rings made of black EPDM rubber which are resistant to ageing, heat and chemical additives and are particularly suitable for all types of treated water.

The reliable, high-quality components are suitable for heating, cooling, compressed air, oil and diesel lines in the civil, industrial and manufacturing sectors.

Pressure & Temperature Rating:

• Maximum operating pressure: 230PSI / 16Bar
• Operating temperature: -20°C +95°C
• Maximum temperature: 120°C on approved applications.
• Up to 580PSI / 40Bar available on approved applications.

GAS APPLICATION

The stainless steel Press-Fit system is used in Australia, New Zealand and many European countries for gas distribution systems, with external above-ground pipes, installed inside or outside buildings. It can be used for all types of combustible gas, both natural and liquid.

For gas applications, the O-ring gaskets are made of yellow HNBR which is compatible with common gas varieties used and are resistant to ageing and heat.

Pressure & Temperature Rating:

• Maximum operating pressure: 70PSI / 5Bar
• Operating temperature: -20°C +70°C

The standard O-rings, made of black EPDM rubber, are used for general applications. They are resistant to ageing, heat and chemical additives.

BLACK EPDM O-RING SEAL

The black EPDM rubber seal is standard for stainless steel and carbon steel systems. EPDM is suitable for temperatures between -20 and +120 °C and for pressures up to a maximum of 230PSI / 16Bar. It has a host of applications and is used for drinking water, heating, cooling, steam, firefighting, compressed air (oil-free) and inert gas systems.

YELLOW HNBR O-RING SEAL

The yellow HNBR rubber seal is used in gas systems. It is suitable for temperatures between -20 and +70 °C and for pressures up to a maximum of 70PSI / 5Bar.

BSP stands for British Standard Pipe, yet the thread has been adopted internationally. BSP threaded fittings are used in UK, Europe, Asia, South Africa and Australia. The fittings are one of the most used in New Zealand and are found in a variety of metals across many industries.

Common applications for stainless steel BSP fittings include food & beverage, pumping, petrochemical, marine, geothermal, agriculture and machinery.

The Metal Company stock a full range of BSP threaded fittings, including elbows, tees, hosetails, bushes, reducing connectors, sockets, nipples, plugs, caps and Mac Unions.

The Mac Union, also known as a BSP union or simply as a threaded union, is mostly used to access BSP threaded pipework.

The union features a flat face with a flat seal positioned at the connection point. To prevent leakage, the pipework must be straight to ensure both faces of the union align.

In comparison to brass and other materials used in the industry, The Metal Company supply investment cast Mac Unions manufactured from stainless steel grade 316 which is suitable for all environments including marine applications. Like our other BSP threaded fittings, the maximum pressure for Mac Unions is 150 lbs.

Mac Unions are made up of three parts; the Female-Male Union Part, Female-Female Mac Union Part and O-ring seal. These are supplied as one unit with an EPDM seal included and replacement seals are available separately in EPDM and Teflon (PTFE).

The EPDM seal has a maximum temperature of 120°C and is suitable for hot water, steam, alcohols or coolants. It is not resistant to mineral oils, greases and fuels. However, the Teflon seal has a maximum temperature of 250°C and is suitable for chemical resistance.

All standard* flanges stocked by The Metal Company are Tasman Thickness (also referred to as Light Weight). In many cases, a full thickness flange is not required on low-pressure pipework and thin-wall tube installations.

Tasman Thickness is an Australian/New Zealand norm for flange thickness. It specifies a thinner, lightweight flange than the standard thickness, which is especially noticeable for larger sized flanges. The thickness is constant across a number of flange sizes and increases more gradually in comparison to the full thicknesses. Although flanges are regarded as ‘Lightweight’, the flange thickness may, in fact, be thicker and heavier for smaller sized flanges.

Please note: *May not apply to BSP Threaded Flanges, which feature a raised face.

Maximum Seal Temperature: +70°C

Insertion rubber is manufactured with cotton reinforcement to assist tensile strength and resistant to splitting. This is a general-purpose rubber and can withstand a low temperature range.

The Metal Company use black insertion rubber for standard flange gaskets.

Maximum Seal Temperature: +70°C

Other titles: Highly Saturated Nitrile, Halogenated Acrylonitrile Butadiene, trade names include Zeptol, Therban or Zhanber.

Hydrogenated Nitrile Butadiene Rubber (HNBR) is resistant to abrasion and retains properties when exposed to heat, oil, gas or steam. In some situations, HNBR rubber can withstand up to 140°C temperatures for a short period of time.

Yellow HNBR rubber is used for seals on press-fit fittings to suit gas systems. It is suitable for temperatures between -20°C and +70°C, and for pressures up to a maximum of 70PSI / 5Bar.

Maximum Seal Temperature: +100-120°C

Other Titles: Buna-N, Perbunan, Acrylonitrile Butadiene Rubber or Nitrile-Butadiene Rubber (NBR).

Nitrile (NBR) is a synthetic rubber which is suitable for oils, hydrocarbon fuels, hydraulic fluids, fats and flame retardant liquids.

The Metal Company use white nitrile rubber for food grade quality (FQ) flange gaskets. Blue nitrile rubber is used for standard RJT stepped seals with a maximum temperature of 100°C and DIN O-ring seals with a maximum temperature of 120°C. Black nitrile rubber is used for camlock gaskets. Nitrile is also used for black seals on Table E Lugged Butterfly Valves, with a maximum temperature of 120°C.

Maximum Seal Temperature: +120°C

Other Titles: Ethylene Propylene Diene Monomer

Ethylene Propylene Diene Monomer (EPDM) is a long-lasting synthetic rubber which is suitable for hot water, steam, alcohols, coolants, acids and bases. It is not resistant to mineral oils, greases or fuels. EPDM seals are used for flexibility, good insulation properties and the general temperature range of -20°C and +120°C.

The Metal Company use black EPDM rubber for standard seals on stainless steel and carbon steel Press-Fit fittings, standard seals for BSP threaded Mac Unions and standard seals for Tri Clover unions. Green EPDM Rubber is used as chemical-resistant seals for RJT stepped seals. EPDM is used for a range of valve seals including Mini Ball Valves, Sanitary Non-Return Valves, E Series Butterfly Valves, Sanitary Ball Valves and Inline Non-Return Valves.

Maximum Seal Temperature: +150°C

Other Titles: Ethylene Propylene Rubber

Ethylene Propylene Rubber (EPR) is a synthetic rubber closely related to EPDM rubber and is suitable for heat, water, steam, alkali, mild acidic and UV exposure.

The Metal Company use Black EPR rubber for standard RJT O-ring seals.

Maximum Seal Temperature: +230°C

Other Titles: Fluoroelastomer (FKM)

FKM (Viton) is a synthetic rubber suitable for higher temperatures and restricting permeation of chemicals.

The Metal Company use FKM (Viton) rubber for Tri Clover seals that require high-temperature and chemical resistance.