Cryogenic PCTFE Seat F316 Socket Welded Ball Valve

Product Overview

The low-temperature PCTFE valve seat F316 socket welded ball valve is a special valve specially designed for cryogenic working conditions. It adopts ASTM A182 F316 stainless steel forged valve body and is equipped with PCTFE (polychlorotrifluoroethylene) valve seat connected by socket welding. It maintains excellent sealing performance and structural integrity in an extremely low-temperature environment of -196℃, and is an ideal solution for the treatment of cryogenic media such as liquefied natural gas (LNG), liquid nitrogen, and liquid oxygen.

Technical specifications

Product features

1. Special low-temperature PCTFE valve seat

Ultra-low temperature adaptability

It maintains excellent elasticity and sealing performance at -196℃

Ultra-low permeability prevents valve seat damage caused by medium penetration

It has excellent cold flow resistance and can maintain preload for a long time

Outstanding mechanical performance

Compressive strength ≥ 70 MPa (2-3 times that of PTFE)

It has high hardness and excellent wear resistance

Chemical compatibility

Resistant to corrosion by most acids, alkalis and solvents

It is applicable to cryogenic media such as LNG, liquid nitrogen and liquid oxygen

2. Deep cryogenic treatment of F316 stainless steel

Low-temperature toughness guarantee

All pressure-bearing parts are subjected to deep cryogenic treatment at -196℃

Eliminate manufacturing stress and stabilize the organizational structure

Ensure impact toughness at low temperatures

Material certification

Provide the material certificate of 3.1

The low-temperature impact energy is ≥ 41 J@ -196℃

3. Socket welding connection design

Permanent connection

It is welded into one with the pipeline system to achieve a zero-leakage connection

It is suitable for high-pressure and vibration working conditions

Save installation space and have a neat appearance

Welding optimization

The bevel design complies with ASME B16.25 standard

Reserve an appropriate allowance for welding shrinkage

4. Low-temperature extended neck structure

Effective heat insulation

Extend the valve neck to ensure that the temperature of the stuffing box is above 0℃

Prevent the valve stem from getting stuck due to icing

Standard length and custom length are available

Cold insulation design

A cold insulation layer fixing ring is provided on the outer surface of the valve neck

It is convenient for continuous construction of the cold insulation layer

5. Special sealing system for cryogenic treatment

Multi-level packing

Main seal: Low-temperature flexible graphite

Secondary seal: Bellows structure (optional)

Dust-proof sealing: Special low-temperature material

Anti-lock design

Low-temperature compensation for the gap between the ball and the valve seat

Prevent jamming caused by low-temperature shrinkage

Application field

1. Liquefied natural gas

LNG receiving terminal loading and unloading system

Liquefaction unit process pipeline

Control of storage tank inlet and outlet

Shut-off valve in front of the vaporizer

2. Industrial gases

Liquid oxygen/liquid nitrogen pipelines for air separation units

Liquid storage tank feeding and discharging system

Tank truck loading and unloading system

Inlet and outlet of the cryogenic liquid transfer pump

3. Specialty chemicals

Low-temperature solvent system

Special gas liquefaction device

Ultra-low temperature experimental equipment

4. New energy

Liquid hydrogen storage system

Superconducting cooling system

Aerospace cryogenic fuel

Summary

The low-temperature PCTFE valve seat F316 socket welded ball valve, through the perfect combination of dedicated low-temperature materials, optimized cryogenic structure and precise manufacturing process, provides for the cryogenic industry

Reliable cryogenic sealing: The PCTFE valve seat maintains excellent elasticity at -196℃

Long service life: Deep cryogenic treatment ensures the low-temperature stability of the material

Absolute safe connection: Socket welding connection achieves permanent zero leakage

Convenient maintainability: The modular design supports rapid maintenance

This product is an ideal choice for the LNG, industrial gas and cryogenic chemical fields. With its outstanding low-temperature performance and reliable quality, it provides a safe and reliable guarantee for the treatment of cryogenic media.