Gas Cylinder Valves Solution-brass casting
DSW industry is one of the leading Manufacturers of standard and custom cylinder valves, including cryogenic valves, gas cylinder valves, diaphragm valves, pressure regulators, and cylinder regulators with high quality and better prices.
No matter what material your cylinder is made of, valves are usually made of solid brass casting or forging. They’re screwed into the cylinder neck thread and sealed by an o-ring or thread tape.
Cylinder Valve Types
| TYPE | MEDIUM AVAILABLE | WP(Mpa) | INLET THREAD | OUTLET THREAD | SAFETY DEVICE(Mpa) | DN(mm) | STRUCTURAL STYLE |
| QF-2 | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2B | O2,N2 | 15 | GB8335 PZ27.8 | G5/8-LH | 21±1.5 | 4 | Valve type |
| QF-2B1 | O2,N2 | 15 | G1/2 | W22×1/14 | 21±1.5 | 4 | Valve type |
| QF-2C | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2D | O2,N2 | 15 | GB8335 PZ27.8 | Internal thread G5/8 | 21±1.5 | 4 | Valve type |
| QF-2E | O2,N2 | 15 | JIS B 8246 V1 φ20 | W22×1/14 | 4 | Valve type | |
| QF-2F | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| QF-2G | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Shaft type |
| QF-2M | O2,N2 | 15 | GB8335 PZ27.8 | G1/2 | 21±1.5 | 4 | Valve type |
| QF-2P | O2,N2 | 15 | GB8335 PZ27.8 | G5/8 | 21±1.5 | 4 | Valve type |
| 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 |
Gas Bottle Valve- Oxygen cylinder valve
Types of Gas Valves
Compression Packed Valves
These valves use compressed packing to make a seal around the valve spindle & body. To ensure a good seal, the packing nut is tightened to compress the packing against the spindle. As this results in higher torques, the valve is operated with wrench. The design allows for tightening of the gland nut in case of leakage past the packings.
O-Ring Seal Valves
These valves have a non-rising upper spindle & threaded lower spindle. It uses O-ring/s to create a seal around the upper spindle. The top spindle is designed to fail first, allowing valve maintenance & package content recovery in the event of a failure, even when the cylinder is full. These valves come in key, toggle, handwheel & handle operation.
Brass Material for Cylinder Valves
GAS CYLINDER VALVES 3/4″ -14 NOT – ARGON, HELIUM, NITROGEN
This DSW gas valve is made from heavy-duty forged brass and is specifically designed for use with argon, helium, or nitrogen in steel inert gas cylinders.
Typical applications include welding and other industrial uses.
PREMIUM CONSTRUCTION
Heavy-duty forged brass body for durability and high pressure
Precisely machined internal components meet the most stringent international valve performance standards
Metal-to-metal seal below bonnet threads prevents tension in the lines at the top of the valve body
GAS CYLINDER VALVES
Pressure relief device
Automated assembly and testing processes ensure exceptional quality
100% helium leak tested
A pressure Relief Device (PRD) is a unitized plug design that provides excellent flow characteristics and ensures proper assembly and tamper resistance.
Direct-drive stem design with optimized O-ring or double O-ring seal reduces friction and operates at deficient torque levels.
Tapped for dip tube as required
