Is PTFE good for steam?

Carbon Filled PTFE (C) 25% Carbon Graphite with 75% PTFE, this material offers a wide temperature range with better wear resistance than standard RPTFE. Good for steam service -50°F to 450°F.

Table of Contents

What is api607?

API 607 provides fire test criteria for quarter-turn valves and other valves with nonmetallic seating under pressure, whereas API 6FA provides the fire testing requirements for API 6A and API 6D valves. API 6FA is applicable for metal seated valves.

What is api6fa?

Description / Abstract: API SPEC 6FA, 3rd Edition, April 1999 – Specification for Fire Test for Valves. It is the purpose of this document to establish, the requirements for testing and evaluating the pressure-containing performance of API 6A and 6D valves when exposed to fire.

Are gate valves fire safe?

API 6FA is most commonly used for metal-seated products, including ball, gate and globe valves. One view in the industry is that most metal-seated gate and globe valves are inherently fire-safe and don’t need to be tested. While the majority of these valves do pass this test, some designs fail miserably.

Which is better VITON or EPDM?

Temperature – Viton® temperature resistance ranges from -20°C to 210°C, while EPDM temperature resistance ranges from -45°C to 145° This means that both are excellent for extreme temperatures, but EPDM has a slight edge in colder temperatures, while Viton® is better for heat resistance at higher temperatures.

Is PEEK a fluorocarbon?

What is PEEK? Polymer products from Fluorocarbon | Fluorocarbon.

Does PEEK absorb water?

Plastics with very low water absorption are polymers such as PEEK,PPS, PSU, PPSU, PEI, PVDF, PET, PPE, PP and PE. Furthermore, low water absorption is exhibited by POM, PA12, PC and ABS.

What does API 607 mean?

What is a firesafe valve?

Fire-safe valves are spring-loaded valves that are thermally actuated. In case of fire, they close automatically and stop the fuel flow. The fuel flow from the crankcase of the engine and the reserve oil supply gets hindered, thus minimizing the chances of leakage.

Is PTFE the same as EPDM?

EPDM is softer and performs better as a sealing material (it conforms better to rough surface finishes). Teflon is stiffer and slicker, therefore it may perform better in a dynamic or abrasive application. Both could care less about sea water in terms of chemical assault or corrosion.

What is a Viton seat?

Because of its heat tolerance and resistance to corrosion, VITON is used in the manufacture of valve seats such as a knife gate valve. However, this valve is not compatible with processes that involve water or steam.

What is EPDM seat?

EPDM is the abbreviated name for Ethylene Propylene Diene Monomer. In general industry, one may see other abbreviations or trade names used in lieu of EPDM such as EPT, Nordel, ECD, or EPR. All of these are the same materials as EPDM. EPDM is a standard seat material offered in Bray resilient-seated butterfly valves.

Is PEEK and PTFE the same?

PTFE (polytetrafluoroethylene) belongs to the fluoropolymer family, which is distinct from PEEK. The presence of fluorine provides even greater chemical resistance. Both PEEK and PTFE are stable at temperatures up to 260˚C (500˚F).

Are nylon seats the same as Devlon seats?

The Devlon seats have been produced at a local company. The Devlon seats looks and feels the same as the Nylon seats. So now we are in doubt. Can anybody explain the difference between Nylon and Devlon?

What is Devlon used for?

Devlon is used in many valve seats which require a broad range of working temperatures, excellent corrosion resistance and outstanding resistance in high pressure applications. Temperature Range -50°F to 350°F

What is the temperature range of Devlon?