A351 CF8M Cast Stainless Steel Piston Valve

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A351 CF8M Cast Stainless Steel Piston Valve

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MOQ : 5 Units

A351 CF8M Cast Stainless Steel Piston Valve Specification

Structure
Piston Type

Material
A351 CF8M Cast Stainless Steel

Power
Manual

Pressure
PN16 (max 16 bar)

Media
Water, Oil, Air, Steam

Working Temperature
-29C to 180C

Port Size
15 mm to 150 mm

Surface
Shot Blasted / Natural Finish

Shape
Straight / Globe Pattern

Application
Steam, Oil, Gas, Chemical Industries

Trim Material
Stainless Steel

Packing
Graphite / PTFE

Operation
Handwheel Operated

End Connection
Flanged ends as per ASME B16.5

Seat Type
Renewable PTFE / Metal Seated

Bonnet Type
Bolted Bonnet

Design Standard
BS 5154 / DIN 3356

Body Material
Stainless Steel ASTM A351 Gr. CF8M

Leakage Class
Class VI (Bubble Tight)

A351 CF8M Cast Stainless Steel Piston Valve Trade Information

Minimum Order Quantity
5 Units

Supply Ability
200 Units Per Month

Delivery Time
7 Days

About A351 CF8M Cast Stainless Steel Piston Valve

A351 CF8M Cast Stainless Steel Piston Valve

Full port forged steel isolation valves with a maximum operating pressure of 1973 psig/136 Barg and a maximum operating temperature of 800oF/427oC. The burnished piston and metal reinforced graphite rings provide leak-proof shut off and allow Piston Valves to be operated at higher temperatures, while also extending operating life.

Piston Valves are available in Socket Weld, BSPT, and NPT end connections. Flanged ends can be supplied upon request. Piston Valves are ideal for saturated and superheated steam, and hot water applications.

Piston Valves Feature :

Leak-proof isolation
Sizes from 1/2"/15mm to 1-1/2"/40mm
Choice of socket weld or threaded connections
Compatible with ASME
Resistant to cavitation
All sealing valve components may be easily replaced in-line
Long-term operation. Piston valve design ensures actuation even after many years without operation
Fire-proof performance

Design Standards :

ASME (B16.34, B16.5)
Inspection and testing (API 598)
Leak test (ANSI/FCI 70-2 )
Fire test (API SPEC 6FA : 1999

Design features of Piston Valves :

Materials of Construction

Body and Bonnet ASTM A105N / A350 LF2 Forged Steel
Spindle SS T304
Ring Valve SS T3016 + Graphite
Piston SS 17-4 PH
Spacer CA 40
Belleville Washer ASTM A231
Name Plate SS 304

Reliable Bubble-Tight Sealing

This piston valve achieves Class VI leakage performance, ensuring exceptional bubble-tight shut-off for critical media like steam, oil, gas, and chemicals. Its renewable PTFE or metal seats allow easy maintenance and consistent performance, minimizing leakage and operational downtime.

Corrosion-Resistant Construction

Manufactured using ASTM A351 Grade CF8M cast stainless steel for both body and trim, this valve demonstrates excellent resistance to corrosion and wear. The durable material composition extends service life, even in aggressive media and harsh industrial environments.

Versatile Industrial Applications

Designed in accordance with BS 5154 / DIN 3356, this flanged-end piston valve suits a wide range of operating conditions. Whether for oil, water, air, or steam, its shot-blasted or natural finish, combined with multiple packing options, offers adaptability and reliable functionality in diverse sectors.

FAQ's of A351 CF8M Cast Stainless Steel Piston Valve:

Q: How does the A351 CF8M Cast Stainless Steel Piston Valve ensure bubble-tight sealing?

A: This piston valve is designed with a renewable PTFE or metal seat which provides Class VI leakage performance (bubble tight), effectively eliminating leaks and maintaining seal integrity under high-pressure conditions up to PN16.

Q: What are the main advantages of using ASTM A351 Gr. CF8M stainless steel for the valve body and trim?

A: ASTM A351 Gr. CF8M stainless steel offers superior corrosion resistance and mechanical strength, ensuring longevity and reliability. It is particularly beneficial in applications involving aggressive media such as steam, chemicals, oil, and gas.

Q: When should this piston valve be selected for an industrial application?

A: This valve is ideally chosen for scenarios demanding reliable shut-off, minimal leakage, and corrosion resistance, such as steam, chemical, oil, and gas processing systems, especially when operating pressures do not exceed PN16 (16 bar).

Q: Where can the A351 CF8M piston valve be installed in process systems?

A: It is suitable for installation in various pipeline systems, including those for water, oil, air, steam, and chemicals. The valve can be used in manufacturing plants, refineries, and process industries across India and globally.

Q: What is the recommended process for maintaining the valve and its renewable seats?

A: Regular inspection of the sealing surfaces and packing material (PTFE or graphite) is suggested. The renewable seat design simplifies replacement and maintenance procedures, helping to quickly restore bubble-tight performance without extensive downtime.

Q: How is the piston valve operated and what are its usage benefits?

A: Operation is manual via a handwheel, providing precise flow control. Benefits include reliable operation, easy maintenance due to renewable seats, and adaptability to challenging industrial media.

Q: What are the available sizes and patterns for this piston valve?

A: This valve is manufactured in port sizes ranging from 15 mm up to 150 mm and is available in both straight and globe patterns to suit various piping configurations.

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