Material Alloy Steel F91 (EN 1.4903) valves are made of high-temperature, creep-resistant chromium-molybdenum forged steel containing approximately 9% chromium, 1% molybdenum, and vanadium. They can withstand extreme pressures and temperatures up to 600°C–650°C, making them ideal for high-temperature steam media, such as high-pressure, high-temperature steam piping systems, power plants, and long-haul fossil fuel boilers.

1. Key Features of F91 (EN 1.4903) Valves:

F91 (EN 1.4903) valves are alloy steel valves made of high-temperature resistant, creep-resistant chromium-molybdenum forged steel, containing approximately 9% chromium, 1% molybdenum, and 1% vanadium. These valves can withstand extreme pressures and temperatures up to 600°C to 650°C, making them ideal for high-temperature steam media, such as high-pressure, high-temperature steam pipeline systems, power plants, and long-haul fossil fuel boilers.

2. Key Advantages of Freeman Valve's F91 Valves:

2.1 Outstanding High-Temperature Creep Fracture Strength of Freeman Valve's F91 Valves: 

The addition of V, Nb, and N elements to form stable carbonitride pinned grain boundaries results in creep strength approximately twice that of F22 and significantly higher than F9. Under the same temperature and pressure, the wall thickness can be reduced, decreasing equipment weight and pipeline load;

2.2 Freeman Valve's F91 valves exhibit excellent high-temperature oxidation resistance: 

Containing 9% Cr, F91 valves form a dense oxide layer, providing superior oxidation resistance in pure steam environments;

2.3 Freeman Valve's F91 valves demonstrate excellent resistance to hydrogen corrosion: 

F91 valves outperform low-chromium molybdenum steel in high-temperature, high-pressure hydrogen-contaminated conditions, making them ideal for high-temperature hydrogen-contaminated pipelines in oil refining hydrogenation and gasification units;

2.4 Freeman Valve's F91 valves exhibit good resistance to thermal fatigue: 

Their excellent resistance to thermal fatigue makes F91 valves highly suitable for boilers and combined cycle units experiencing frequent start-ups and shutdowns and temperature fluctuations.

3. Precautions for using F91 valves:

3.1 The welding and heat treatment requirements for F91 valves are extremely stringent:

F91 valves must be preheated to 205–370℃, and interpass temperature must be controlled; post-weld forced PWHT: narrow window insulation of 730–780℃; the heat treatment range is narrow, too low a temperature will easily cause hardening and embrittlement, too high a temperature will result in loss of creep strength;

3.2 F91 valves have limited corrosion resistance:

F91 valves are only suitable for pure steam and clean hydrogen-containing media; F91 valves are not resistant to chloride ions, sulfides, and acidic media.

4. Key application areas for Freeman Valve's F91 valves:

4.1 Freeman Valve's F91 valves have been widely used in the thermal power industry. For example:

① Main steam and high-temperature reheat steam pipelines for supercritical/subcritical and combined cycle power plants;

② Boiler superheaters and reheater headers;

③ Waste incineration and biomass high-temperature boilers;

4.2 Freeman Valve's F91 valves have been widely used in the petroleum refining and coal chemical industries. For example:

① High-temperature heating furnace inlets and outlets and high-temperature hydrogen pipelines in hydrogenation units;

② High-temperature and high-pressure process pipelines in coal gasification and syngas units;

4.3 Freeman Valve's F91 valves have been widely used in energy infrastructure and industrial heating. For example:

① High-temperature and high-pressure steam networks, accumulators, and high-temperature heat exchangers in large-scale combined heat and power plants;

② Molten salt energy storage and high-temperature thermal oil systems.

5. Summary of F91 Valve Selection

5.1 Prioritize F91 valves: 

Suitable for temperatures between 540 and 620°C, where the medium is pure steam or hydrogen-containing, and where lightweight design and creep control are key performance indicators.

5.2 Not recommended for F91 valves: 

① Operating temperatures consistently above 620°C; 

② Chlorine-containing, acidic, or high-sulfur corrosive environments.

Main Features of F91 Valve, EN 1.4903 Valve

Type of F91 Valve:

F91 Ball Valve;

F91 Instrument Ball Valve;

F91 Sleeve Plug Valve;

F91 Wedge Gate Valve;

F91 Globe Valve;

F91 Swing Check Valve;

F91 Lift Check Valve;

F91 Piston Check Valve;

F91 Wafer Check Valve;

F91 Triple Offset Butterfly Valve;

F91 Y Type Strainer;

F91 T Type Strainer;

F91 Basket Type Strainer;

F91 Diaphragm Valve;

F91 Spring Loaded Safety Valve.

Design and Test Standard of F91 Valve:

F91 High Performance Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 High Performance Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Instrument Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 Instrument Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Sleeve Plug Valve Design Acc. to API 599 & ASME B16.34, Test Acc. to API 598;

F91 Wedge Gate Valve Design Acc. to API 603 & ASME B16.34, Test Acc. to API 598;

F91 Wedge Gate Valve Design Acc. to API 602, Test Acc. to API 598;

F91 Wedge Gate Valve Design Acc. to EN 1984 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Globe Valve Design Acc. to BS 1873 & ASME B16.34, Test Acc. to API 598;

F91 Globe Valve Design Acc. to API 602, Test Acc. to API 598;

F91 Globe Valve Design Acc. to EN 13709 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Swing Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F91 Swing Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Lift Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F91 Lift Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Piston Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F91 Piston Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Wafer Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

F91 Wafer Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Check Valve Design Acc. to API 602, Test Acc. to API 598;

F91 Triple Offset Butterfly Valve Design Acc. to API 609 & ASME B16.34, Test Acc. to API 598;

F91 Triple Offset Butterfly Valve Design Acc. to EN 593 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Y Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 Y Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 T Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 T Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Basket Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 Basket Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Diaphragm Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

F91 Diaphragm Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

F91 Spring Loaded Safety Valve Design Acc. to API 520 & API 526, Test Acc. to API 527;

F91 Spring Loaded Safety Valve Design Acc. to ISO 4126, Test Acc. to ISO 4126.

Surface Finishing of F91 Valve:

All F91 Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-55.

Size of F91 Valve:

From 1/4’’ to 48’’ (ANSI Standard F91 Valve);

From DN8 to DN1200 (EN Standard F91 Valve, DIN Standard F91 Valve).

Face to Face of F91 Valve:

Face to Face Acc. to ASME B16.10 (ANSI Standard F91 Valve);

Face to Face Acc. to EN 558-1 (EN Standard F91 Valve, DIN Standard F91 Valve).

Pressure Rating of F91 Valve:

ANSI Class 150 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 300 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 600 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 800 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 900 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 1500 F91 Valve (ANSI Standard F91 Valve);

ANSI Class 2500 F91 Valve (ANSI Standard F91 Valve);

EN 1092 PN 16 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 25 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 40 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 63 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 100 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 160 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 250 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 320 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve);

EN 1092 PN 400 F91 Valve (EN Standard F91 Valve, DIN Standard F91 Valve).

Working Temperature of F91 Valve:

Please refer to the "Temperature and Pressure Curve of F91 Valve" for temperature and pressure changes.

Ends Connection of F91 Valve:

ANSI Flange Ends F91 Valve;

ANSI Integral Flange Ends F91 Valve;

ANSI Welded Flange Ends F91 Valve;

Butt Weld (ASME B16.25) Ends F91 Valve;

Butt Weld x ANSI Flange Ends F91 Valve;

EN 1092 Flange Ends F91 Valve;

EN 1092 Integral Flange Ends F91 Valve;

EN 1092 Welded Flange Ends F91 Valve;

Butt Weld (EN 12627) Ends F91 Valve;

Butt Weld (ISO 1127) Ends F91 Valve;

Butt Weld x EN 1092 Flange Ends F91 Valve;

Male NPT (ASME B1.20.1) Ends F91 Valve;

Male BSPP (ISO 228-1) Ends F91 Valve;

Male BSPT (ISO 7-1) Ends F91 Valve;

Male NPT x Female NPT Ends F91 Valve;

Male BSPP x Female BSPP Ends F91 Valve;

Male BSPT x Female BSPT Ends F91 Valve;

Male NPT x Long Butt Weld (+100 mm) Ends F91 Valve;

Male BSPP x Long Butt Weld (+100 mm) Ends F91 Valve;

Male BSPT x Long Butt Weld (+100 mm) Ends F91 Valve;

Female NPT (ASME B1.20.1) Ends F91 Valve;

Female BSPP (ISO 228-1) Ends F91 Valve;

Female BSPT (ISO 7-1) Ends F91 Valve;

Socket Weld (ASME B16.11) Ends F91 Valve;

Socket Weld (EN 12760) Ends F91 Valve;

Female NPT x Socket Weld Ends F91 Valve;

Female BSPP x Socket Weld Ends F91 Valve;

Female BSPT x Socket Weld Ends F91 Valve;

Butt Weld (ASME B16.25) Ends F91 Valve;

Butt Weld (EN 12627) Ends F91 Valve;

Female NPT x Butt Weld Ends F91 Valve;

Female BSPP x Butt Weld Ends F91 Valve;

Female BSPT x Butt Weld Ends F91 Valve;

Female NPT x Long Butt Weld Ends (+100 mm) Ends F91 Valve;

Female BSPP x Long Butt Weld Ends (+100 mm) Ends F91 Valve;

Female BSPT x Long Butt Weld Ends (+100 mm) Ends F91 Valve;

Long Butt Weld Ends (+100 mm Weld Stub) Ends F91 Valve.

CE Marking of F91 Valve:

CE Marking is Available to F91 Valve with a Diameter of DN32 or Larger.

Chemical Composition of F91 Valve:

For the Chemical Composition of F91 Valve, please refer to EN 10204 Type 3.1 certificate.

Mechanical Properties of F91 Valve:

For the Mechanical Properties of F91 Valve, please refer to EN 10204 Type 3.1 certificate.

Certificate of F91 Valve:

All F91 Valve will be delivered with EN 10204 Type 3.1 Certificate.

Operation of F91 Valve:

Level Operation of F91 Valve;

Handwheel Operation of F91 Valve;

Pneumatic Actuator Operation of F91 Valve;

Electric Actuator Operation of F91 Valve.

Approvals of F91 Valve:

MSS SP-55 Certified of F91 Valve;

NACE MR 0175 Certified of F91 Valve

API 607 Fire Safe Certified of F91 Valve;

ISO 9001 Certified of F91 Valve;

PED Certified of F91 Valve.

Available Upon Request of F91 Valve:

NACE MR0175 is available upon request of F91 Valve;

ATEX is available upon request of F91 Valve;

TA-LUFT is available upon request of F91 Valve;

SIL is available upon request of F91 Valve;

Degreasing is available upon request of F91 Valve;

Fire Safe is available upon request of F91 Valve;

Stem Extension is available upon request of F91 Valve;

Double Block and Bleed is available upon request of F91 Valve.

Type of EN 1.4903 Valve:

EN 1.4903 Ball Valve;

EN 1.4903 Instrument Ball Valve;

EN 1.4903 Sleeve Plug Valve;

EN 1.4903 Wedge Gate Valve;

EN 1.4903 Globe Valve;

EN 1.4903 Swing Check Valve;

EN 1.4903 Lift Check Valve;

EN 1.4903 Piston Check Valve;

EN 1.4903 Wafer Check Valve;

EN 1.4903 Triple Offset Butterfly Valve;

EN 1.4903 Y Type Strainer;

EN 1.4903 T Type Strainer;

EN 1.4903 Basket Type Strainer;

EN 1.4903 Diaphragm Valve;

EN 1.4903 Spring Loaded Safety Valve.

Design and Test Standard of EN 1.4903 Valve:

EN 1.4903 High Performance Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 High Performance Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Instrument Ball Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 Instrument Ball Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Sleeve Plug Valve Design Acc. to API 599 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Wedge Gate Valve Design Acc. to API 603 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Wedge Gate Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.4903 Wedge Gate Valve Design Acc. to EN 1984 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Globe Valve Design Acc. to BS 1873 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Globe Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.4903 Globe Valve Design Acc. to EN 13709 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Swing Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Swing Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Lift Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Lift Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Piston Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Piston Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Wafer Check Valve Design Acc. to API 594 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Wafer Check Valve Design Acc. to EN 16767 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Check Valve Design Acc. to API 602, Test Acc. to API 598;

EN 1.4903 Triple Offset Butterfly Valve Design Acc. to API 609 & ASME B16.34, Test Acc. to API 598;

EN 1.4903 Triple Offset Butterfly Valve Design Acc. to EN 593 & EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Y Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 Y Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 T Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 T Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Basket Type Strainer Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 Basket Type Strainer Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Diaphragm Valve Design Acc. to ASME B16.34, Test Acc. to API 598;

EN 1.4903 Diaphragm Valve Design Acc. to EN 12516-1/2, Test Acc. to EN 12266-1/2;

EN 1.4903 Spring Loaded Safety Valve Design Acc. to API 520 & API 526, Test Acc. to API 527;

EN 1.4903 Spring Loaded Safety Valve Design Acc. to ISO 4126, Test Acc. to ISO 4126.

Surface Finishing of EN 1.4903 Valve:

All EN 1.4903 Valve surface is finely machined to achieve the required roughness and conforms to standard MSS SP-55.

Size of EN 1.4903 Valve:

From 1/4’’ to 48’’ (ANSI Standard EN 1.4903 Valve);

From DN8 to DN1200 (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve).

Face to Face of EN 1.4903 Valve:

Face to Face Acc. to ASME B16.10 (ANSI Standard EN 1.4903 Valve);

Face to Face Acc. to EN 558-1 (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve).

Pressure Rating of EN 1.4903 Valve:

ANSI Class 150 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 300 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 600 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 800 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 900 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 1500 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

ANSI Class 2500 EN 1.4903 Valve (ANSI Standard EN 1.4903 Valve);

EN 1092 PN 16 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 25 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 40 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 63 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 100 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 160 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 250 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 320 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve);

EN 1092 PN 400 EN 1.4903 Valve (EN Standard EN 1.4903 Valve, DIN Standard EN 1.4903 Valve).

Working Temperature of EN 1.4903 Valve:

Please refer to the "Temperature and Pressure Curve of EN 1.4903 Valve" for temperature and pressure changes.

Ends Connection of EN 1.4903 Valve:

ANSI Flange Ends EN 1.4903 Valve;

ANSI Integral Flange Ends EN 1.4903 Valve;

ANSI Welded Flange Ends EN 1.4903 Valve;

Butt Weld (ASME B16.25) Ends EN 1.4903 Valve;

Butt Weld x ANSI Flange Ends EN 1.4903 Valve;

EN 1092 Flange Ends EN 1.4903 Valve;

EN 1092 Integral Flange Ends EN 1.4903 Valve;

EN 1092 Welded Flange Ends EN 1.4903 Valve;

Butt Weld (EN 12627) Ends EN 1.4903 Valve;

Butt Weld (ISO 1127) Ends EN 1.4903 Valve;

Butt Weld x EN 1092 Flange Ends EN 1.4903 Valve;

Male NPT (ASME B1.20.1) Ends EN 1.4903 Valve;

Male BSPP (ISO 228-1) Ends EN 1.4903 Valve;

Male BSPT (ISO 7-1) Ends EN 1.4903 Valve;

Male NPT x Female NPT Ends EN 1.4903 Valve;

Male BSPP x Female BSPP Ends EN 1.4903 Valve;

Male BSPT x Female BSPT Ends EN 1.4903 Valve;

Male NPT x Long Butt Weld (+100 mm) Ends EN 1.4903 Valve;

Male BSPP x Long Butt Weld (+100 mm) Ends EN 1.4903 Valve;

Male BSPT x Long Butt Weld (+100 mm) Ends EN 1.4903 Valve;

Female NPT (ASME B1.20.1) Ends EN 1.4903 Valve;

Female BSPP (ISO 228-1) Ends EN 1.4903 Valve;

Female BSPT (ISO 7-1) Ends EN 1.4903 Valve;

Socket Weld (ASME B16.11) Ends EN 1.4903 Valve;

Socket Weld (EN 12760) Ends EN 1.4903 Valve;

Female NPT x Socket Weld Ends EN 1.4903 Valve;

Female BSPP x Socket Weld Ends EN 1.4903 Valve;

Female BSPT x Socket Weld Ends EN 1.4903 Valve;

Butt Weld (ASME B16.25) Ends EN 1.4903 Valve;

Butt Weld (EN 12627) Ends EN 1.4903 Valve;

Female NPT x Butt Weld Ends EN 1.4903 Valve;

Female BSPP x Butt Weld Ends EN 1.4903 Valve;

Female BSPT x Butt Weld Ends EN 1.4903 Valve;

Female NPT x Long Butt Weld Ends (+100 mm) Ends EN 1.4903 Valve;

Female BSPP x Long Butt Weld Ends (+100 mm) Ends EN 1.4903 Valve;

Female BSPT x Long Butt Weld Ends (+100 mm) Ends EN 1.4903 Valve;

Long Butt Weld Ends (+100 mm Weld Stub) Ends EN 1.4903 Valve.

CE Marking of EN 1.4903 Valve:

CE Marking is Available to EN 1.4903 Valve with a Diameter of DN32 or Larger.

Chemical Composition of EN 1.4903 Valve:

For the Chemical Composition of EN 1.4903 Valve, please refer to EN 10204 Type 3.1 certificate.

Mechanical Properties of EN 1.4903 Valve:

For the Mechanical Properties of EN 1.4903 Valve, please refer to EN 10204 Type 3.1 certificate.

Certificate of EN 1.4903 Valve:

All EN 1.4903 Valve will be delivered with EN 10204 Type 3.1 Certificate.

Operation of EN 1.4903 Valve:

Level Operation of EN 1.4903 Valve;

Handwheel Operation of EN 1.4903 Valve;

Pneumatic Actuator Operation of EN 1.4903 Valve;

Electric Actuator Operation of EN 1.4903 Valve.

Approvals of EN 1.4903 Valve:

MSS SP-55 Certified of EN 1.4903 Valve;

NACE MR 0175 Certified of EN 1.4903 Valve

API 607 Fire Safe Certified of EN 1.4903 Valve;

ISO 9001 Certified of EN 1.4903 Valve;

PED Certified of EN 1.4903 Valve.

Available Upon Request of EN 1.4903 Valve:

NACE MR0175 is available upon request of EN 1.4903 Valve;

ATEX is available upon request of EN 1.4903 Valve;

TA-LUFT is available upon request of EN 1.4903 Valve;

SIL is available upon request of EN 1.4903 Valve;

Degreasing is available upon request of EN 1.4903 Valve;

Fire Safe is available upon request of EN 1.4903 Valve;

Stem Extension is available upon request of EN 1.4903 Valve;

Double Block and Bleed is available upon request of EN 1.4903 Valve.