Markets

Products A to Z

Wafer Check (Non-Return) Valves

Wafer multi-flange check valves are compact and lightweight, suitable for mounting between a wide range of flanges including PN6, PN10, PN16, PN25, PN40, ANSI 150, ANSI 300 and others

JV080009 – Stainless Steel Wafer Swing Check (Non-Return) Valve – EPDM Seal

Stainless steel wafer swing type check valve suitable for water applications.

Type
Swing (Flap)
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16/25/40 & ANSI 300 Flanges
Duty
Water
Materials
Stainless Steel Body & Flap • EPDM Seals
Pressure Rating
40-80mm PN25 • 100-300mm PN16
Temperature
0°C to 130°C
Contact UsJV080009 – Stainless Steel Wafer Swing Check (Non-Return) Valve - EPDM Seal - PDF Datasheet

JV080009 – Stainless Steel Wafer Swing Check (Non-Return) Valve

JV080012 – Stainless Steel Wafer Swing Check (Non-Return) Valve – NBR Seal

Stainless steel wafer swing type check valve suitable for a wide range of applications particularly oil.

Type
Swing (Flap)
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16/25/40 & ANSI 300 Flanges
Duty
Air • Inert Gas • Oil • Water
Materials
Stainless Steel Body & Flap • NBR Seals
Pressure Rating
40-80mm PN25 • 100-300mm PN16
Temperature
0°C to 95°C (dependent on pressure)
Contact UsJV080012 – Stainless Steel Wafer Swing Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080012 – Stainless Steel Wafer Swing Check (Non-Return) Valve - NBR Seal

JV080010 – Stainless Steel Wafer Swing Check (Non-Return) Valve – Viton Seal

Stainless steel wafer swing type check valve suitable for high-temperature applications.

Type
Swing (Flap)
Size & Connections
DN50 to DN300 • Wafer – Between BS4504 PN16 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body & Flap • Viton Seals
Pressure Rating
PN16
Temperature
-25°C to 180°C (dependent on pressure)
Buy JV080010 – Stainless Steel Wafer Swing Check (Non-Return) Valve - Viton SealJV080010 – Stainless Steel Wafer Swing Check (Non-Return) Valve - Viton Seal - PDF Datasheet

JV080010 – Stainless Steel Wafer Swing Check (Non-Return) Valve - Viton Seal

JV080011 – Stainless Steel Wafer Swing Check (Non-Return) Valve – PTFE Seal

Stainless steel wafer swing type check valve suitable for a wide range of applications.

Type
Swing (Flap)
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16/25/40 & ANSI 300 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body & Flap • PTFE Seals
Pressure Rating
40-80mm PN25 • 100-300mm PN16
Temperature
0°C to 200°C (dependent on pressure)
Contact UsJV080011 – Stainless Steel Wafer Swing Check (Non-Return) Valve - PTFE Seal - PDF Datasheet

JV080011 – Stainless Steel Wafer Swing Check (Non-Return) Valve - PTFE Seal

JV080013 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve – NBR Seal

Stainless steel wafer swing type check valve with spring assisted closing, suitable for a wide range of applications particularly oil.

Type
Swing (Flap) • Spring Assisted
Size & Connections
DN32 to DN250 • Wafer – Between BS4504 PN6/10/16/25 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Water
Materials
Stainless Steel Body, Flap & Spring • Viton Seals
Pressure Rating
32-200mm PN25 • 250mm PN16
Temperature
-10°C to 100°C (dependent on pressure)
Contact UsJV080013 – Stainless Steel Wafer Swing c/w Spring Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080013 – Stainless Steel Wafer Swing c/w Spring Check (Non-Return) Valve - NBR Seal

JV080014 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve – Viton Seal

Stainless steel wafer swing type check valve with spring assisted closing, suitable for various applications.

Type
Swing (Flap) • Spring Assisted
Size & Connections
DN32 to DN250 • Wafer – Between BS4504 PN6/10/16/25 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Water
Materials
Stainless Steel Body, Flap & Spring • Viton Seals
Pressure Rating
32-200mm PN25 • 250mm PN16
Temperature
-10°C to 150°C (dependent on pressure)
Contact UsJV080014 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve - Viton Seal - PDF Datasheet

JV080014 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve - Viton Seal

JV080015 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve – PTFE Seal

Stainless steel wafer swing type check valve with spring assisted closing, suitable for high-temperature applications.

Type
Swing (Flap) • Spring Assisted
Size & Connections
DN32 to DN250 • Wafer – Between BS4504 PN6/10/16/25 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Flap & Spring • PTFE Seals
Pressure Rating
32-200mm PN25 • 250mm PN16
Temperature
-10°C to 200°C (dependent on pressure)
Contact UsJV080015 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve - PTFE Seal - PDF Datasheet

JV080015 – Stainless Steel Wafer Spring Assisted Swing Check (Non-Return) Valve - PTFE Seal

JV080020 – Brass Wafer Spring Assisted Disc Check (Non-Return) Valve – Metal Seat

An economical spring-loaded non-return valve with a brass body and a stainless steel disc.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN16/25/40 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Brass Body • Stainless Steel Disc & Spring
Pressure Rating
PN52
Temperature
-10°C to 300°C (dependent on pressure)
Contact UsJV080020 – Brass Wafer Spring Assisted Disc Check (Non-Return) Valve - PDF Datasheet

JV080020 – Brass Wafer Spring Assisted Disc Check (Non-Return) Valve

JV080021 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – Metal Seat

An economical spring-loaded non-return valve with a stainless steel body and disc with a metal seat.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN10/16/25/40. ANS1 150 & 300 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Disc & Spring • Metal Seat
Pressure Rating
PN40
Temperature
0°C to 200°C (dependent on pressure)
Buy JV080021 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal SeatJV080021 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat - PDF Datasheet

JV080021 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat

JV080022 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – EPDM Seat

An economical spring-loaded non-return valve with a stainless steel body and disc with an EPDM seat suitable for water applications.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN10/16/25/40 ANS1 150 & 300 Flanges
Duty
Water
Materials
Stainless Steel Body, Disc & Spring • EPDM Seat
Pressure Rating
PN52
Temperature
0°C to 130°C (dependent on pressure)
Contact UsJV080022 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - EPDM Seat - PDF Datasheet

JV080022 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - EPDM Seat

JV080023 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – NBR Seat

An economical spring-loaded non-return valve with a stainless steel body and disc with an NBR seat suitable for air & oil applications.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN10/16/25/40. ANS1 150 & 300 Flanges
Duty
Air • Oil
Materials
Stainless Steel Body, Disc & Spring • NBR Seat
Pressure Rating
PN52
Temperature
0°C to 95°C (dependent on pressure)
Contact UsJV080023 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - NBR Seat - PDF Datasheet

JV080023 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - NBR Seat

JV080024 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – Viton Seat

An economical spring-loaded non-return valve with a stainless steel body and disc with a Viton seat suitable for a wide range of applications.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN10/16/25/40. ANS1 150 & 300 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Disc & Spring • Viton Seat
Pressure Rating
PN52
Temperature
0°C to 200°C (dependent on pressure)
Contact UsJV080024 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Viton Seat - PDF Datasheet

JV080024 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Viton Seat

JV080025 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – PTFE Seat

An economical spring-loaded non-return valve with a stainless steel body and disc with a Viton seat suitable for a wide range of applications.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504 PN10/16/25/40. ANS1 150 & 300 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Disc & Spring • Viton Seat
Pressure Rating
PN52
Temperature
0°C to 200°C (dependent on pressure)
Contact UsJV080025 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - PTFE Seat - PDF Datasheet

JV080024 – Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Viton Seat

DCV2 – Spirax Sarco Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve – Metal Seat

A high-quality (non-return) valve is suitable for use on a wide range of fluids for applications in process lines, hot water systems, steam and condensate systems etc.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504, ANSI, BST & JIS Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Disc & Spring • Metal Seat
Pressure Rating
PN40
Temperature
0°C to 300°C (dependent on pressure)
Compliance & Approvals
EN 558 part 1, series 49
Contact UsDCV2 – Spirax Sarco Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat - PDF Datasheet

DCV2 – Spirax Sarco Stainless Steel Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat

RK44 – Gestra Bronze Wafer Spring Assisted Disc Check (Non-Return) Valve – Metal Seat

A high-quality (non-return) valve is suitable for use on a wide range of fluids for applications in process lines, hot water systems, steam and condensate systems etc.

Type
Disc • Spring Assisted
Size & Connections
DN15 to DN100 • Wafer – Between BS4504, ANSI, BST & JIS Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Disc & Spring • Metal Seat
Pressure Rating
PN16
Temperature
-200°C to 230°C (dependent on pressure)
Compliance & Approvals
EN 558 part 1, table 11, series 49
Contact UsRK44 – Gestra Bronze Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat - PDF Datasheet

RK44 – Gestra Bronze Wafer Spring Assisted Disc Check (Non-Return) Valve - Metal Seat

JV081016 – Cast Iron Wafer Spring Assisted Dual Plate Check Valve – Short Length

A WRAS approved epoxy coated cast iron, spring-loaded dual plate check valve with stainless steel flaps and EPDM seats suitable for water applications.

Type
Dual Plate • Spring Assisted
Size & Connections
DN50 to DN300 • Wafer – Between BS4504 PN10/16 & ANSI 150 Flanges
Duty
Water
Materials
Cast Iron Body • Stainless Steel Plates & Spring • EPDM Seat
Pressure Rating
PN16
Temperature
-10°C to 110°C
Compliance & Approvals
WRAS
Contact UsJV081016 – Cast Iron Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - EPDM Seat - PDF DatasheetWRAS Approved Product

JV081016 – Cast Iron Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - EPDM Seat

JV081002 – Cast Iron Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – Long Length

A WRAS approved epoxy coated cast iron, spring-loaded dual plate check valve with stainless steel flaps and EPDM seats suitable for water applications.

Type
Dual Plate • Spring Assisted
Size & Connections
DN50 to DN600 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Water
Materials
Cast Iron Body • Stainless Steel Plates & Spring • EPDM Seat
Pressure Rating
PN16
Temperature
-10°C to 120°C
Compliance & Approvals
WRAS (Series 5106W & 5306W)
Buy JV081002 – Cast Iron Wafer Spring Assisted Dual Plate Check (Non-Return) Valve - Long LengthJV081002 – Cast Iron Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - EPDM Seat - PDF DatasheetWRAS Approved Product

JV081002 – Cast Iron Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - EPDM Seat

JV081007 – Ductile Iron Marine Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – NBR Seat

A marine duty ductile iron, spring-loaded dual plate check valve with aluminium bronze flaps and NBR seats suitable for cold and hot water, seawater, fuel oil and other non-aggressive media.

Type
Dual Plate • Spring Assisted
Size & Connections
DN50 to DN600 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Ductile Iron Body • Stainless Steel Spring • Ali-Bronze Plates • NBR Seat
Pressure Rating
50-300mm PN16 • 350-600mm PN10
Temperature
-40°C to 100°C
Contact UsJV081007 – Ductile Iron Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat - PDF Datasheet

JV081007 – Ductile Iron Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat

JV080016 – Ali-Bronze Marine Wafer Swing Check (Non-Return) Valve – Length A

A marine quality aluminium bronze swing type check (non-return) valve check valve with spring assisted closing, generally used to prevent backflow in water and seawater systems.

Type
Swing (Flap)
Size & Connections
DN32 to DN500 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Flap • NBR Seals
Pressure Rating
32-150mm PN16 • 200-500mm PN10
Temperature
-10°C to 100°C
Contact UsJV080016 – Aluminium Bronze Marine Wafer Swing Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080016 – Aluminium Bronze Marine Wafer Swing Check (Non-Return) Valve - NBR Seal

JV080017 – Ali-Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve – Length A

A marine quality aluminium bronze swing type check (non-return) valve generally used to prevent backflow in water and seawater systems.

Type
Swing (Flap) • Spring Assisted
Size & Connections
DN32 to DN500 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Flap • Stainless Steel Spring • NBR Seals
Pressure Rating
32-150mm PN16 • 200-500mm PN10
Temperature
-10°C to 100°C
Contact UsJV080017 – Aluminium Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080017 – Aluminium Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve - NBR Seal

JV080018 – Ali-Bronze Marine Wafer Swing Check (Non-Return) Valve – Length B

A marine quality aluminium bronze swing type check (non-return) valve check valve generally used to prevent backflow in water and seawater systems.

Type
Swing (Flap)
Size & Connections
DN40 to DN500 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Flap • NBR Seals
Pressure Rating
40-200mm PN16 • 250-300mm PN10/16 • 350-500mm PN10
Temperature
-40°C to 100°C
Contact UsJV080018 – Aluminium Bronze Marine Wafer Swing Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080018 – Aluminium Bronze Marine Wafer Swing Check (Non-Return) Valve - NBR Seal

JV080019 – Ali-Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve – Length B

A marine quality aluminium bronze swing type check (non-return) valve with spring assisted closing, generally used to prevent backflow in water and seawater systems.

Type
Swing (Flap) • Spring Assisted
Size & Connections
DN40 to DN500 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Flap • Stainless Steel Spring • NBR Seals
Pressure Rating
40-200mm PN16 • 250-300mm PN10/16 • 350-500mm PN10
Temperature
-40°C to 100°C
Contact UsJV080019 – Aluminium Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve - NBR Seal - PDF Datasheet

JV080019 – Aluminium Bronze Marine Wafer Spring Assisted Swing Check (Non-Return) Valve - NBR Seal

JV081003 – Stainless Steel Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – Metal Seat

Dual plated, spring-loaded non-return valve suitable for a wide range of applications.

Type
Dual Plate • Spring Assisted
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16, ANSI 150 & BST D/E Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Plates & Spring • Metal Seat
Pressure Rating
PN16
Temperature
-40°C to 180°C (dependent on pressure)
Contact UsJV081003 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Metal Seat - PDF Datasheet

JV081003 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Metal Seat

JV081004 – Stainless Steel Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – Viton Seat

Dual plated, spring-loaded non-return valve with a length to DIN 3202-K3 / ISO 5752 long.

Type
Dual Plate • Spring Assisted
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16/25 Flanges
Duty
Air • Inert Gas • Oil • Water
Materials
Stainless Steel Body, Plates & Spring • Viton Seat
Pressure Rating
PN10
Temperature
-10°C to 150°C (dependent on pressure)
Compliance & Approvals
DIN 3202-K3 / ISO 5752 long
Contact UsJV081004 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Viton Seat - PDF Datasheet

JV081004 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Viton Seat

JV080031 – Stainless Steel Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – Viton Seat

Dual plated, spring-loaded non-return valve with a length to EN 558 part 1.

Type
Dual Plate • Spring Assisted
Size & Connections
DN40 to DN300 • Wafer – Between BS4504 PN10/16/25 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Steam • Water
Materials
Stainless Steel Body, Plates & Spring • Viton Seat
Pressure Rating
PN25
Temperature
-20°C to 180°C (dependent on pressure)
Compliance & Approvals
EN 558 part 1
Contact UsJV080031 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Viton Seat - PDF Datasheet

JV080031 – Stainless Steel Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - Viton Seat

JV081008 – Ali-Bronze Marine Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – NBR Seat

A marine duty aluminium bronze, spring-loaded dual plate check valve an NBR seat suitable for fitting between PN6 flanges as well as PN10/16 & ANSI 150.

Type
Dual Plate • Spring Assisted
Size & Connections
DN50 to DN600 • Wafer – Between BS4504 PN6/10/16 & ANSI 150 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Plates • Stainless Steel Spring • NBR Seat
Pressure Rating
PN16
Temperature
-10°C to 90°C
Contact UsJV081008 – Aluminium Bronze Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat - PDF Datasheet

JV081008 – Aluminium Bronze Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat

JV080032 – Ali-Bronze Marine Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – NBR Seat

A marine duty aluminium bronze, spring-loaded dual plate check valve an NBR seat suitable for cold and hot water, seawater, fuel oil and other non-aggressive media.

Type
Dual Plate • Spring Assisted
Size & Connections
DN50 to DN600 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Air • Inert Gas • Oil • Seawater • Water
Materials
Aluminium Bronze Body & Plates • Stainless Steel Spring • NBR Seat
Pressure Rating
50-300mm PN16 • 350-600mm PN10
Temperature
-40°C to 100°C
Contact UsJV080032 – Aluminium Bronze Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat - PDF Datasheet

JV080032 – Aluminium Bronze Marine Wafer Spring Assisted Duel Plate Check (Non-Return) Valve - NBR Seat

CVW – uPVC Wafer Swing Check (Non-Return) Valve – EPDM Seal

Lightweight and economic uPVC Wafer Swing Check (Non-Return) Valve with EPDM seals.

Type
Swing (Flap)
Size & Connections
DN32 to DN300 • Wafer – Between BS4504 PN10/16 Flanges
Duty
Water
Materials
Upvc Body & Flap • EPDM Seals
Pressure Rating
10 Bar
Temperature
0°C to 60°C
Contact UsCVW – uPVC Wafer Swing Check (Non-Return) Valve – EPDM Seal - PDF Datasheet

CVW – uPVC Wafer Swing Check (Non-Return) Valve – EPDM Seal