QF Series Cylinder Valves

Oxygen/Co2/Nitrogen/Argon Gas Valves

DSW offer a reliable gas cyliner valve solution for controlling gas flow across diverse industries.
Their robust design, versatility, and safety features make them suitable for both standard and specialized applications.
With options tailored for medical, industrial, and high-purity gas applications, these valves ensure optimal performance and longevity, supporting the safety and efficiency of your gas handling system.

How to choose the Right Valve?

When selecting a gas cylinder valve, consider the following factors:
Gas Type
Ensure the valve is rated for the specific gas you’re using, as different gases may require unique materials and construction to handle their properties safely.
Pressure Requirements
Verify the working pressure rating to match your system’s specifications. For instance, DSW’s valves typically support a working pressure of 15 MPa.
Connection Compatibility
Choose a valve with inlet and outlet threads compatible with your existing gas cylinder and system connections.

Gas Cylinder Valves Series

Gas cylinder valves are critical for controlling the flow of gases in industrial, medical, and speciality applications.
Since 2004, DSW has specialized in designing and manufacturing gas valves specifically for gases like oxygen, carbon dioxide (CO2), nitrogen, and argon for customers overseas.
The QF Series Cylinder Valves are designed to switch gas flow in cylinders containing oxygen, argon, nitrogen, and air.

Features of Gas Cylinder Valves

  • Medium Available
    These valves are versatile for multiple applications because they can handle a range of gases, including oxygen (O2), carbon dioxide (CO2), nitrogen (N2), and argon (Ar).
  • Inlet and Outlet Threads
    Standard thread specifications, like GB8335 PZ27.8 for the inlet and G5/8 for the outlet, ensure compatibility with industry-standard gas cylinders and fittings, promoting safe and secure connections.
  • Safety Device
    These valves, equipped with a built-in pressure relief device (PRD) rated at 21±1.5 MPa, can prevent over-pressurization, a crucial feature for maintaining safe operating conditions.
  • Working Pressure and Bore Size
    With a typical working pressure (WP) of 15 MPa and bore size (DN) of 4 mm, these valves are designed to handle high-pressure environments while providing efficient gas flow control.

gas cylinder valves

Types of  Cylinder Valves

DSW offers an extensive line of gas cylinder valves under its QF series, each designed for specific applications and structural styles:

Type Medium Available Working Pressure (MPa) Inlet Thread Outlet Thread Safety Device (MPa) Nominal Diameter (DN, mm) Structural Style
QF-4 O2, N2 15 GB8335 PZ27.8 G3/4 21±1.5 4 Valve type
QF-5 O2, N2 20 GB8335 PZ27.8 G5/8 28±2 4 Valve type
QF-6 O2, N2 15 GB8335 PZ27.8 Internal thread G5/8 4 Valve type
QF-7 O2, N2 15 GB8335 PZ27.8 Internal thread G5/8 4 Needle form
QF-8 O2, N2 15 GB8335 PZ27.8 G1/2 4 Shaft type
QF-12 O2, N2 15 GB8335 PZ19.2 G5/8 21±1.5 4 Valve type
QF-20 O2, N2 15 GB8335 PZ19.2 G1/2 21±1.5 2 Diaphragm type
QF-21 O2, N2 15 GB8335 PZ19.2 W21.8×1/14 21±1.5 2 Diaphragm type
QF-22 O2, N2 15 GB8335 PZ27.8 W21.8×1/14 21±1.5 4 Valve type
QF-25 O2 15 GB8335 PZ19.2 φ7 Hose 2 Needle form
QF-27 O2, N2 15 JIS B 8246 V1 W22×1/14 21±1.5 3 Valve type
F-1 O2, N2 15 GB8335 PZ27.8 Internal thread W23×1/14 21±1.5 4 Valve type
F-2 O2, N2 15 JIS B 8246 V2 Internal thread W23×1/14 21±1.5 4 Valve type
F-3 O2, N2 15 BS341 1×1/14 Internal thread G5/8 21±1.5 4 Shaft type
DF-4 O2, N2 15 GB8335 PZ27.8 G5/8 21±1.5 4 Shaft type

Notes:
Please be aware that thread standards vary by country, impacting compatibility with your gas cylinder. To ensure proper fit and functionality, please review the thread specifications for each valve or fitting before placing an order.

Gas Cylinder Valves

Construction and Quality Assurance

DSW’s cylinder valves are built with premium materials to withstand high pressure and temperature variations. They feature a metal-to-metal seal and precisely machined internal components for optimal durability. This robust construction ensures low life cycle costs due to fewer replacements and repairs. Furthermore, each valve goes through automated assembly and testing processes, ensuring that every product meets international quality and performance standards.

gas cylinder valves
gas cylinder valves
gas cylinder valves
gas cylinder valves
gas cylinder valves
Our valves are precision-made with high-quality materials and components meeting tight Compressed Gas Association (CGA) specifications.
With a vast selection of valve types and sizes at low prices, DSW is your go-to source in China for compressed gas cylinder valves.