The Double Flange Vacuum Butterfly Valve has a Triple Offset structure inside, and its main body is made of stainless steel or carbon steel, which is used to connect the gas in the vacuum pipeline.
It can withstand positive pressure, the valve stem does not move up and down, the card is closed with a limited structure, and the valve plate has a locking device.
Frequently Asked Questions
What vacuum conditions should I provide for a double-flanged valve inquiry?
State the required absolute pressure, gas composition, temperature and leakage acceptance, together with the operating sequence. Request confirmation of the exact valve and seal performance rather than relying only on the vacuum product name.
Does the mention of positive pressure establish the rating I need?
Request the documented allowable pressure conditions and directions for the selected valve. A general positive-pressure statement is not a product-specific pressure-temperature rating.
Which details should I compare before connecting the valve to vacuum piping?
Send the actual flange and seal arrangement, required size and face-to-face dimensions. Confirm the selected drawing and operating and maintenance clearance before approving the installation.