SQK A351 CN7M Alloy 20 Gate Valve

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MOQ : 5 Units

SQK A351 CN7M Alloy 20 Gate Valve Specification

Sealing
PTFE / Metal to Metal

Structure
Bolted Bonnet

Connection
Flanged Ends

Size
DN50 to DN600

Material
A351 CN7M Alloy 20

Type
Gate Valve

Power Source
Manual

Pressure
Class 150 to Class 600

Media
Acid, Alkali, Salts, Water, Oil

Working Temperature
-29C to 425C

Port Size
2 Inch to 24 Inch

Surface
Corrosion Resistant Finish

Shape
Gate Type

Operation
Handwheel

End Connection
RF / RTJ (Raised Face / Ring Type Joint)

Design
Full Bore, Rising Stem

Application
Chemical Processing, Petrochemical, Pharmaceutical

Face to Face Dimension
ASME B16.10

Testing
API 598

Packing Material
Graphite / PTFE

Standard
API 600 / ASME B16.34

Body Material
Nickel-Iron-Chromium Alloy

SQK A351 CN7M Alloy 20 Gate Valve Trade Information

Minimum Order Quantity
5 Units

Supply Ability
200 Units Per Month

Delivery Time
7 Days

About SQK A351 CN7M Alloy 20 Gate Valve

SQK A351 CN7M Alloy 20 Gate Valve

The API 600 Gate Valves is exceptionally sturdy, rugged, and durable, with a reputation for quality, integrity, and long service.

They are designed for tight sealing and ease of operation. The valves are available flanged & butt-weld ends in pressure rating from ASME Class 150 to Class 2500, and in a variety of materials of construction.

Gate Valves are of flexible wedge design, outside screw and yoke, and bolted-bonnet construction. The valves conform to API 600.

Main features :

Bolted body-bonnet design, seal welded & Valves with pressure seal bonnet
Bellows-sealed Gate and Globe valves available
Bolted body-bonnet joints provided with spiral-wound stainless steel gasket and graphite
filler for maximum protection against leaks
Die-formed graphite inner packing rings and braided graphite end rings with Inconel wire
reinforcement and corrosion inhibitor
T-head stem-disc connection of gate valve fully meets strength requirements of API 602 and API 598
Rolled ACME thread on stem for smooth operation
Tapered shoulder on the stem for back seating
Self-aligning type gland assembly with stud-and-nut tightening
Integral hard-faced body seat for globe and check valves
Spring-loaded disc on check valves suitable for no horizontal applications too
Gate and globe valves can be offered with electrical actuators
Austenitic SS forging for body and bonnet of Cryogenic valves, resulting in excellent impact strength, minimal heat loss and resistance to corrosion
Valves can be offered to NACE MR-0175 and other special NACE requirements

Premium Material & Design

Manufactured with A351 CN7M Alloy 20, this gate valve offers excellent resistance to corrosion and chemical attack, making it ideal for aggressive industrial applications. Its full bore and rising stem design improve flow efficiency and facilitate positive shut-off, while options for graphite or PTFE packing ensure safe sealing under a wide range of temperatures.

Versatile Operations & Standards Compliance

The valve is designed and tested according to API 600, API 598, and ASME B16.34, ensuring durability and safe operation. Suitable for manual operation using a handwheel, it is available in a variety of port sizes and pressure classes, making it adaptable for different flow requirements and process conditions.

FAQ's of SQK A351 CN7M Alloy 20 Gate Valve:

Q: How does the SQK A351 CN7M Alloy 20 Gate Valve provide corrosion resistance in chemical processing environments?

A: The valve is constructed from Alloy 20, a Nickel-Iron-Chromium alloy, which inherently resists corrosion from acids, alkalis, and salts. Its corrosion-resistant surface enhancement further protects against aggressive media typically found in chemical, petrochemical, and pharmaceutical industries.

Q: What is the typical process for installing this gate valve with RF or RTJ flanged ends?

A: Installation involves aligning the flanged ends of the valve with pipeline flanges according to ASME B16.10 face-to-face dimensions. Suitable gaskets are placed between flanges, and bolts are tightened progressively for an even, leak-free seal. It is important to follow standard industry practices and check alignment to preserve proper function and sealing.

Q: When should I use graphite versus PTFE packing in the SQK A351 CN7M Gate Valve?

A: Graphite packing is recommended for high-temperature applications due to its excellent heat resistance and sealing properties. PTFE packing is suitable where chemical compatibility and non-reactivity are prioritized, especially at lower to moderate temperatures, ensuring a tight, leak-proof seal.

Q: Where is this gate valve most commonly applied?

A: It is predominantly used in sectors requiring robust resistance to chemical exposure such as chemical processing, petrochemicals, and pharmaceuticals. The valve is suitable for regulating flow in pipelines carrying acid, alkali, salient solutions, water, and oil.

Q: What are the primary benefits of the full bore and rising stem design?

A: Full bore construction minimizes pressure loss and facilitates easy pipeline pigging, while the rising stem allows for clear visual indication of valve position, aiding maintenance and operational safety.

Q: Can this valve handle high-pressure and temperature media?

A: Yes, the SQK A351 CN7M Alloy 20 Gate Valve is rated for pressure classes 150 to 600 and can operate effectively across a temperature range from -29C to 425C, making it suitable for a variety of demanding service conditions.

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