Send Inquiry

Request To Call Back

Class 800 Piston Valve

Get a Price/Quote

MOQ : 5 Units

Class 800 Piston Valve Specification

Structure
Piston Type

Material
Forged Carbon Steel

Power
Manual

Pressure
Class 800 (High Pressure)

Media
Gas, Oil, Water

Working Temperature
Up to 425C

Port Size
15mm to 100mm

Surface
Black Painted Finish

Shape
Straight

Application
Steam, Oil, Water Lines

Testing Standard
API 598

Body Material Specification
ASTM A105

Size Range
1/2" to 4"

Bonnet Type
Bolted Bonnet

Leakage Class
Bubble Tight Shut-Off

Seat Type
Renewable Stainless Steel Seats

End Connection
Socket Weld / Screwed

Packing
Graphite Asbestos

Handle Type
Handwheel

Design Standard
BS 5154 / API 623

Class 800 Piston Valve Trade Information

Minimum Order Quantity
5 Units

Supply Ability
200 Units Per Month

Delivery Time
7 Days

About Class 800 Piston Valve

Class 800 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

High-Pressure Performance & Safety

Manufactured to Class 800 standards, this piston valve is designed to handle demanding environments including steam, oil, and water systems. The bubble tight shut-off and robust bolted bonnet ensure reliable sealing against leaks, even under elevated pressure and temperature. Its forged carbon steel body delivers enhanced durability, making it suitable for industrial settings that require uncompromised performance.

Versatile Connectivity & Maintenance

Engineered with socket weld or screwed end connections, the piston valve enables efficient installation and integration into various piping layouts. The renewable stainless steel seats and graphite asbestos packing allow for straightforward maintenance. The straight valve structure optimizes flow, while handwheel control ensures precise manual operation in diverse industrial applications.

FAQ's of Class 800 Piston Valve:

Q: How is the Class 800 Piston Valve installed in industrial pipelines?

A: The valve features socket weld or screwed end connections, which are suitable for secure and easy installation in steam, oil, and water lines. Proper alignment and welding or threading ensure a reliable fit in your pipeline system.

Q: What are the benefits of using a piston valve with bubble tight shut-off and graphite asbestos packing?

A: These features offer superior leakage prevention and dependable sealing under high-pressure conditions, minimizing downtime and maintenance costs in demanding steam, oil, and water applications.

Q: When should renewable stainless steel seats be replaced or maintained?

A: Seat maintenance or replacement is recommended during regular service intervals or if leakage is detected. The renewable design simplifies the process, enhancing valve longevity and performance in high-pressure systems.

Q: Where is the Class 800 Piston Valve typically used?

A: This valve finds application in steam, oil, and water lines due to its robust construction and ability to withstand high pressures and temperatures. It is commonly employed in power plants, chemical processing facilities, and refineries across India.

Q: What is the process for testing these valves before deployment?

A: Valves are tested according to API 598 standards, ensuring they meet stringent requirements for pressure retention, leakage prevention, and operational integrity prior to installation.

Q: How does manual operation with a handwheel benefit users?

A: The handwheel allows precise control over the valve, providing reliable manual operation even in high-pressure environments. This ensures accurate modulation of flow and safety for operators.

Q: What is the working temperature range for this piston valve?

A: The valve is engineered to perform at working temperatures up to 425C, making it suitable for processing media such as gas, oil, and water under challenging conditions.

Tell us about your requirement