Pneumatic flange hard seal butterfly valve D641H-16C

D641H-16C Pneumatic Flange Hard Seal Butterfly Valve

D641H-16C adopts pneumatic drive and flange connection. According to the valve model coding rules, the structural code of this model is 1, corresponding to the center vertical plate type; Therefore, this model will no longer be described as a three eccentric structure on this page. The current caliber is DN15-DN700, and the pressure is 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?

According to the model structure code 1, this page is treated as a center vertical plate and no longer uses the three eccentric description.

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.