QF-21A Diaphragm Valve
QF-21A
The QF-21A is a diaphragm-sealed cylinder valve for calibration gas service. It uses a flat-face sealing interface.
Key facts
| Applicable medium | Calibration gas |
|---|---|
| Working pressure | 15 MPa |
| Gas-tightness test pressure | 18 MPa |
| Model | QF-21A |
Specifications
Application
| Applicable medium | Calibration gas |
|---|
Pressure and safety
| Working pressure | 15 MPa |
|---|---|
| Gas-tightness test pressure | 18 MPa |
| Proof test pressure | 33.75 MPa |
| Safety device | No safety device |
Connections
| Cylinder / inlet connection | PZ19.2 |
|---|---|
| Connection sealing form | Flat-face seal |
| Outlet connection designation | W21.8-14 RH EXT |
Construction
| Valve structure | Diaphragm-sealed design |
|---|
Materials
| Body material | HPb59-1 |
|---|---|
| Stem material | HPb59-1 |
| Handwheel material | ZL102 |
Operating conditions
| Temperature range | -40 °C to 60 °C |
|---|
Manufacturing references
| Manufacturing standard / reference | GB/T 15382 |
|---|
Product documents
Technical Illustration
For reference. Not to scale. H: overall height in this view. W: overall width in this view. Lettered directions do not specify measured dimensions.
Product overview
The QF-21A is a diaphragm-sealed cylinder valve for calibration gas service. It uses a flat-face sealing interface. The diaphragm-sealed layout is part of this model’s configuration. Provide the gas composition, cylinder connection and equipment requirements when discussing the application.
Key advantages
Calibration gas application
For calibration gas applications. Include the gas composition and service requirements with your enquiry.
Diaphragm-sealed layout
A diaphragm-sealed construction for the stated gas application.
Flat-face mating interface
Match the flat sealing face as well as the connection designation when selecting mating equipment.
Information for your enquiry
Specify the exact model, gas species and required inlet and outlet connections. Confirm the sealing material and service requirements for the requested configuration.
Contact ANYI
Discuss this valve with our team
Send us your gas medium, working pressure, connection requirements and quantity - photos of the valve or cylinder you use today help too - and our team will reply.
Product: QF-21A
- geoffrey@anyivalves.com
- +86 21 52707913
The email and WhatsApp links open your own app with this model already filled in.