Pneumatic flange hard seal butterfly valve D641H-16C

D641H-16C Pneumatic Flange Hard Seal Butterfly Valve

D641H-16C uses pneumatic actuation, flanged connections and a centreline hard-seated disc arrangement. The series covers DN15–DN700 and PN1.0–PN4.0MPa.

What parameters need to be confirmed for a hard seal structure?

The butterfly plate, valve seat, and sealing materials, medium, temperature, working pressure difference, and allowable leakage requirements should be checked. Hard sealing does not mean that all high-temperature, high-pressure, or granular working conditions can be directly used.

How to choose a pneumatic actuator?

Select based on valve opening and closing torque, air source pressure, single or double acting, safe position for gas loss, and accessory requirements. The locator is only configured when corresponding adjustment control is required.

More flange butterfly valves are availableSelection of flange butterfly valve。

Frequently Asked Questions

Is D641H-16C a triple eccentric butterfly valve?

This configuration uses a centreline disc arrangement.

Is a hard seal necessarily zero leakage?

This cannot be guaranteed, it should be determined according to the specific sealing structure and testing requirements.

Does the pneumatic butterfly valve support 4–20mA by default?

Not default, corresponding control attachments such as locators need to be configured.