QF-21A Diaphragm Valve

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.

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Specifications

Parameter	Value
Applicable medium	Calibration gas
Working pressure	15 MPa
Gas-tightness test pressure	18 MPa
Proof test pressure	33.75 MPa
Safety device	No safety device
Cylinder / inlet connection	PZ19.2
Connection sealing form	Flat-face seal
Outlet connection designation	W21.8-14 RH EXT
Valve structure	Diaphragm-sealed design
Body material	HPb59-1
Stem material	HPb59-1
Handwheel material	ZL102
Temperature range	-40 °C to 60 °C
Manufacturing standard / reference	GB/T 15382

Technical Illustration

For reference. Not to scale.

Product Configurator

Model	Gas	Working pressure	Operation / structure	Inlet	Outlet designation	Sealing
QF-21A	Calibration gas	15 MPa	Diaphragm-sealed design	PZ19.2	W21.8-14 RH EXT	Flat-face seal
Your request	Gas request	Working pressure request	Operation / structure request	Inlet request	Outlet designation request	Sealing request

Special requirements are subject to technical confirmation. Your requests do not change the standard product specifications.

Company catalogue

No approved company catalogue is currently available. You can request specific product documents through Technical Matching.

Need this product’s specifications? Print / Save PDF — no form required.

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Regarding: QF-21A · Calibration gas · 15 MPa

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