1. Main characteristics of F11 (EN 1.7335) valves:

F11 is a low-alloy chromium-molybdenum heat-resistant steel, widely used in boilers, pressure vessels, and piping systems.

2. Main advantages of Freeman Valve's F11 valves:

2.1 Freeman Valve's F11 valves have good weldability and a wide heat treatment window: 

F11 valves have low preheating requirements before welding and a wide tolerance for post-weld heat treatment temperature ranges;

2.2 Freeman Valve's F11 valves have sufficient strength at medium temperatures: 

Under operating conditions of ≤480℃, F11 valves have creep and endurance strength sufficient for medium-temperature and medium-pressure steam conditions;

2.3 Freeman Valve's F11 valves have acceptable hydrogen resistance: 

F11 valves can be used in hydrogen-rich environments with less stringent temperature and pressure requirements, suitable for medium- and low-temperature hydrogenation pipelines.

3. Precautions for using F11 valves:

3.1 The operating temperature of F11 valves should not exceed 480℃: 

When the operating temperature exceeds 480℃, the creep strength of F11 valves will decrease rapidly.

3.2 The resistance to sulfidation and oxidation of F11 valves is generally low:

① The corrosion rate of F11 valves to high-temperature H₂S media is significantly higher than that of F22, and far worse than that of F5;

② The corrosion rate of F11 valves to high-temperature oxidizing media is lower than that of F22;

3.3 The upper limit of hydrogen corrosion resistance of F11 valves is lower than that of F22:

① Under high-pressure, high-temperature hydrogen-contaminated conditions, the risk of hydrogen-induced cracking of F11 valves is higher than that of F22;

② F11 valves cannot be used in harsh hydrogenation main process pipelines.

4. Key Application Areas of Freeman Valve's F11 Valves:

4.1 Freeman Valve's F11 valves are widely used in thermal power auxiliary steam systems. For example: 

Bypasses, reheat cold sections, and auxiliary steam pipelines in subcritical units;

4.2 Freeman Valve's F11 valves are widely used in general high-temperature process pipelines in petrochemical plants. For example: 

Heater outlets, fractionation systems, and secondary pipelines in reforming units with operating temperatures ≤480℃;

4.3 Freeman Valve's F11 valves are widely used in non-harsh hydrogenation conditions in oil refining. For example: 

Auxiliary pipelines, venting, and heat exchange sub-lines in hydrogenation units;

4.4 Freeman Valve's F11 valves are widely used in medium-temperature and medium-pressure steam systems in chemical and coal chemical industries. For example: 

Process steam systems with operating temperatures between 420-480℃.

5. F11 valves are not recommended for the following conditions:

① When the design temperature is >480℃, directly upgrade to F22 valves; do not force the use of F11 valves.

② For high-concentration H₂S sulfidation corrosion conditions, F11 valves are insufficiently corrosion-resistant; F5 valves should be selected first.

③ For critical high-temperature, high-pressure hydrogen-related core process pipelines, do not select F11 valves; select F22 valves instead.

5. Summary: 

Choose F11 valves: Auxiliary systems with operating temperatures ≤480℃; 

Choose F22 valves: Main steam systems and main hydrogenation process systems with operating temperatures between 480-540℃.

Main Features of F11 Valve, EN 1.7335 Valve

Type of F11 Valve:

F11 Ball Valve;

F11 Instrument Ball Valve;

F11 Sleeve Plug Valve;

F11 Wedge Gate Valve;

F11 Globe Valve;

F11 Swing Check Valve;

F11 Lift Check Valve;

F11 Piston Check Valve;

F11 Wafer Check Valve;

F11 Triple Offset Butterfly Valve;

F11 Y Type Strainer;

F11 T Type Strainer;

F11 Basket Type Strainer;

F11 Diaphragm Valve;

F11 Spring Loaded Safety Valve.

Design and Test Standard of F11 Valve:

F11 High Performance Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 High Performance Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Instrument Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 Instrument Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Sleeve Plug Valve Design Acc. to API 599 & ASME B16.34, Test Acc. to API 598;

F11 Wedge Gate Valve Design Acc. to API 603 & ASME B16.34, Test Acc. to API 598;

F11 Wedge Gate Valve Design Acc. to API 602, Test Acc. to API 598;

F11 Wedge Gate Valve Design Acc. to EN 1984 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Globe Valve Design Acc. to BS 1873 & ASME B16.34, Test Acc. to API 598;

F11 Globe Valve Design Acc. to API 602, Test Acc. to API 598;

F11 Globe Valve Design Acc. to EN 13709 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Swing Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F11 Swing Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Lift Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F11 Lift Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Piston Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F11 Piston Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Wafer Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F11 Wafer Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Check Valve Design Acc. to API 602, Test Acc. to API 598;

F11 Triple Offset Butterfly Valve Design Acc. to API 609 & ASME B16.34, Test Acc. to API 598;

F11 Triple Offset Butterfly Valve Design Acc. to EN 593 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Y Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 Y Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 T Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 T Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Basket Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 Basket Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Diaphragm Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F11 Diaphragm Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F11 Spring Loaded Safety Valve Design Acc. to API 520 & API 526, Test Acc. to API 527;

F11 Spring Loaded Safety Valve Design Acc. to ISO 4126, Test Acc. to ISO 4126.

Surface Finishing of F11 Valve:

All F11 Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-55.

Size of F11 Valve:

From 1/4’’ to 48’’ (ANSI Standard F11 Valve);

From DN8 to DN1200 (EN Standard F11 Valve, DIN Standard F11 Valve).

Face to Face of F11 Valve:

Face to Face Acc. to ASME B16.10 (ANSI Standard F11 Valve);

Face to Face Acc. to EN 558-1 (EN Standard F11 Valve, DIN Standard F11 Valve).

Pressure Rating of F11 Valve:

ANSI Class 150 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 300 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 600 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 800 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 900 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 1500 F11 Valve (ANSI Standard F11 Valve);

ANSI Class 2500 F11 Valve (ANSI Standard F11 Valve);

EN 1092 PN 16 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 25 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 40 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 63 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 100 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 160 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 250 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 320 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve);

EN 1092 PN 400 F11 Valve (EN Standard F11 Valve, DIN Standard F11 Valve).

Working Temperature of F11 Valve:

Please refer to the "Temperature and Pressure Curve of F11 Valve" for temperature and pressure changes.

Ends Connection of F11 Valve:

ANSI Flange Ends F11 Valve;

ANSI Integral Flange Ends F11 Valve;

ANSI Welded Flange Ends F11 Valve;

Butt Weld (ASME B16.25) Ends F11 Valve;

Butt Weld x ANSI Flange Ends F11 Valve;

EN 1092 Flange Ends F11 Valve;

EN 1092 Integral Flange Ends F11 Valve;

EN 1092 Welded Flange Ends F11 Valve;

Butt Weld (EN 12627) Ends F11 Valve;

Butt Weld (ISO 1127) Ends F11 Valve;

Butt Weld x EN 1092 Flange Ends F11 Valve;

Male NPT (ASME B1.20.1) Ends F11 Valve;

Male BSPP (ISO 228-1) Ends F11 Valve;

Male BSPT (ISO 7-1) Ends F11 Valve;

Male NPT x Female NPT Ends F11 Valve;

Male BSPP x Female BSPP Ends F11 Valve;

Male BSPT x Female BSPT Ends F11 Valve;

Male NPT x Long Butt Weld (+100 mm) Ends F11 Valve;

Male BSPP x Long Butt Weld (+100 mm) Ends F11 Valve;

Male BSPT x Long Butt Weld (+100 mm) Ends F11 Valve;

Female NPT (ASME B1.20.1) Ends F11 Valve;

Female BSPP (ISO 228-1) Ends F11 Valve;

Female BSPT (ISO 7-1) Ends F11 Valve;

Socket Weld (ASME B16.11) Ends F11 Valve;

Socket Weld (EN 12760) Ends F11 Valve;

Female NPT x Socket Weld Ends F11 Valve;

Female BSPP x Socket Weld Ends F11 Valve;

Female BSPT x Socket Weld Ends F11 Valve;

Butt Weld (ASME B16.25) Ends F11 Valve;

Butt Weld (EN 12627) Ends F11 Valve;

Female NPT x Butt Weld Ends F11 Valve;

Female BSPP x Butt Weld Ends F11 Valve;

Female BSPT x Butt Weld Ends F11 Valve;

Female NPT x Long Butt Weld Ends (+100 mm) Ends F11 Valve;

Female BSPP x Long Butt Weld Ends (+100 mm) Ends F11 Valve;

Female BSPT x Long Butt Weld Ends (+100 mm) Ends F11 Valve;

Long Butt Weld Ends (+100 mm Weld Stub) Ends F11 Valve.

CE Marking of F11 Valve:

CE Marking is Available to F11 Valve with a Diameter of DN32 or Larger.

Chemical Composition of F11 Valve:

For the Chemical Composition of F11 Valve, please refer to EN 10204 Type 3.1 certificate.

Mechanical Properties of F11 Valve:

For the Mechanical Properties of F11 Valve, please refer to EN 10204 Type 3.1 certificate.

Certificate of F11 Valve:

All F11 Valve will be delivered with EN 10204 Type 3.1 Certificate.

Operation of F11 Valve:

Level Operation of F11 Valve;

Handwheel Operation of F11 Valve;

Pneumatic Actuator Operation of F11 Valve;

Electric Actuator Operation of F11 Valve.

Approvals of F11 Valve:

MSS SP-55 Certified of F11 Valve;

NACE MR 0175 Certified of F11 Valve

API 607 Fire Safe Certified of F11 Valve;

ISO 9001 Certified of F11 Valve;

PED Certified of F11 Valve.

Available Upon Request of F11 Valve:

NACE MR0175 is available upon request of F11 Valve;

ATEX is available upon request of F11 Valve;

TA-LUFT is available upon request of F11 Valve;

SIL is available upon request of F11 Valve;

Degreasing is available upon request of F11 Valve;

Fire Safe is available upon request of F11 Valve;

Stem Extension is available upon request of F11 Valve;

Double Block and Bleed is available upon request of F11 Valve.

Type of EN 1.7335 Valve:

EN 1.7335 Ball Valve;

EN 1.7335 Instrument Ball Valve;

EN 1.7335 Sleeve Plug Valve;

EN 1.7335 Wedge Gate Valve;

EN 1.7335 Globe Valve;

EN 1.7335 Swing Check Valve;

EN 1.7335 Lift Check Valve;

EN 1.7335 Piston Check Valve;

EN 1.7335 Wafer Check Valve;

EN 1.7335 Triple Offset Butterfly Valve;

EN 1.7335 Y Type Strainer;

EN 1.7335 T Type Strainer;

EN 1.7335 Basket Type Strainer;

EN 1.7335 Diaphragm Valve;

EN 1.7335 Spring Loaded Safety Valve.

Design and Test Standard of EN 1.7335 Valve:

EN 1.7335 High Performance Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 High Performance Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Instrument Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 Instrument Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Sleeve Plug Valve Design Acc. to API 599 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Wedge Gate Valve Design Acc. to API 603 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Wedge Gate Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.7335 Wedge Gate Valve Design Acc. to EN 1984 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Globe Valve Design Acc. to BS 1873 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Globe Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.7335 Globe Valve Design Acc. to EN 13709 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Swing Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Swing Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Lift Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Lift Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Piston Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Piston Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Wafer Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Wafer Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Check Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.7335 Triple Offset Butterfly Valve Design Acc. to API 609 & ASME B16.34, Test Acc. to API 598;

EN 1.7335 Triple Offset Butterfly Valve Design Acc. to EN 593 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Y Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 Y Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 T Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 T Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Basket Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 Basket Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Diaphragm Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.7335 Diaphragm Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.7335 Spring Loaded Safety Valve Design Acc. to API 520 & API 526, Test Acc. to API 527;

EN 1.7335 Spring Loaded Safety Valve Design Acc. to ISO 4126, Test Acc. to ISO 4126.

Surface Finishing of EN 1.7335 Valve:

All EN 1.7335 Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-55.

Size of EN 1.7335 Valve:

From 1/4’’ to 48’’ (ANSI Standard EN 1.7335 Valve);

From DN8 to DN1200 (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve).

Face to Face of EN 1.7335 Valve:

Face to Face Acc. to ASME B16.10 (ANSI Standard EN 1.7335 Valve);

Face to Face Acc. to EN 558-1 (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve).

Pressure Rating of EN 1.7335 Valve:

ANSI Class 150 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 300 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 600 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 800 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 900 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 1500 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

ANSI Class 2500 EN 1.7335 Valve (ANSI Standard EN 1.7335 Valve);

EN 1092 PN 16 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 25 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 40 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 63 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 100 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 160 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 250 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 320 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve);

EN 1092 PN 400 EN 1.7335 Valve (EN Standard EN 1.7335 Valve, DIN Standard EN 1.7335 Valve).

Working Temperature of EN 1.7335 Valve:

Please refer to the "Temperature and Pressure Curve of EN 1.7335 Valve" for temperature and pressure changes.

Ends Connection of EN 1.7335 Valve:

ANSI Flange Ends EN 1.7335 Valve;

ANSI Integral Flange Ends EN 1.7335 Valve;

ANSI Welded Flange Ends EN 1.7335 Valve;

Butt Weld (ASME B16.25) Ends EN 1.7335 Valve;

Butt Weld x ANSI Flange Ends EN 1.7335 Valve;

EN 1092 Flange Ends EN 1.7335 Valve;

EN 1092 Integral Flange Ends EN 1.7335 Valve;

EN 1092 Welded Flange Ends EN 1.7335 Valve;

Butt Weld (EN 12627) Ends EN 1.7335 Valve;

Butt Weld (ISO 1127) Ends EN 1.7335 Valve;

Butt Weld x EN 1092 Flange Ends EN 1.7335 Valve;

Male NPT (ASME B1.20.1) Ends EN 1.7335 Valve;

Male BSPP (ISO 228-1) Ends EN 1.7335 Valve;

Male BSPT (ISO 7-1) Ends EN 1.7335 Valve;

Male NPT x Female NPT Ends EN 1.7335 Valve;

Male BSPP x Female BSPP Ends EN 1.7335 Valve;

Male BSPT x Female BSPT Ends EN 1.7335 Valve;

Male NPT x Long Butt Weld (+100 mm) Ends EN 1.7335 Valve;

Male BSPP x Long Butt Weld (+100 mm) Ends EN 1.7335 Valve;

Male BSPT x Long Butt Weld (+100 mm) Ends EN 1.7335 Valve;

Female NPT (ASME B1.20.1) Ends EN 1.7335 Valve;

Female BSPP (ISO 228-1) Ends EN 1.7335 Valve;

Female BSPT (ISO 7-1) Ends EN 1.7335 Valve;

Socket Weld (ASME B16.11) Ends EN 1.7335 Valve;

Socket Weld (EN 12760) Ends EN 1.7335 Valve;

Female NPT x Socket Weld Ends EN 1.7335 Valve;

Female BSPP x Socket Weld Ends EN 1.7335 Valve;

Female BSPT x Socket Weld Ends EN 1.7335 Valve;

Butt Weld (ASME B16.25) Ends EN 1.7335 Valve;

Butt Weld (EN 12627) Ends EN 1.7335 Valve;

Female NPT x Butt Weld Ends EN 1.7335 Valve;

Female BSPP x Butt Weld Ends EN 1.7335 Valve;

Female BSPT x Butt Weld Ends EN 1.7335 Valve;

Female NPT x Long Butt Weld Ends (+100 mm) Ends EN 1.7335 Valve;

Female BSPP x Long Butt Weld Ends (+100 mm) Ends EN 1.7335 Valve;

Female BSPT x Long Butt Weld Ends (+100 mm) Ends EN 1.7335 Valve;

Long Butt Weld Ends (+100 mm Weld Stub) Ends EN 1.7335 Valve.

CE Marking of EN 1.7335 Valve:

CE Marking is Available to EN 1.7335 Valve with a Diameter of DN32 or Larger.

Chemical Composition of EN 1.7335 Valve:

For the Chemical Composition of EN 1.7335 Valve, please refer to EN 10204 Type 3.1 certificate.

Mechanical Properties of EN 1.7335 Valve:

For the Mechanical Properties of EN 1.7335 Valve, please refer to EN 10204 Type 3.1 certificate.

Certificate of EN 1.7335 Valve:

All EN 1.7335 Valve will be delivered with EN 10204 Type 3.1 Certificate.

Operation of EN 1.7335 Valve:

Level Operation of EN 1.7335 Valve;

Handwheel Operation of EN 1.7335 Valve;

Pneumatic Actuator Operation of EN 1.7335 Valve;

Electric Actuator Operation of EN 1.7335 Valve.

Approvals of EN 1.7335 Valve:

MSS SP-55 Certified of EN 1.7335 Valve;

NACE MR 0175 Certified of EN 1.7335 Valve

API 607 Fire Safe Certified of EN 1.7335 Valve;

ISO 9001 Certified of EN 1.7335 Valve;

PED Certified of EN 1.7335 Valve.

Available Upon Request of EN 1.7335 Valve:

NACE MR0175 is available upon request of EN 1.7335 Valve;

ATEX is available upon request of EN 1.7335 Valve;

TA-LUFT is available upon request of EN 1.7335 Valve;

SIL is available upon request of EN 1.7335 Valve;

Degreasing is available upon request of EN 1.7335 Valve;

Fire Safe is available upon request of EN 1.7335 Valve;

Stem Extension is available upon request of EN 1.7335 Valve;

Double Block and Bleed is available upon request of EN 1.7335 Valve.