Pneumatic hard seal butterfly valve D671H-16C

D671H-16C Pneumatic Clamp Hard Seal Butterfly Valve

D671H-16C uses a pneumatic actuator, wafer connection and centreline hard-seated disc arrangement. The series covers DN50–DN800, PN1.6–PN4.0MPa, with WCB, 304 or 316 material options.

Hard sealed butterfly valves cannot be directly equivalent to triple eccentric valves

Hard seating describes the sealing pair, while centreline or offset geometry describes the disc arrangement. The selected sealing materials and operating conditions determine the applicable temperature, differential pressure and wear characteristics.

Pneumatic control

The selection of the actuator should be based on the opening and closing torque, gas source pressure, single or double acting, and the safe position for gas loss; Electromagnetic valves, limit switches, and positioners are configured according to the project.

More pneumatic butterfly valves can be found fromSelection of pneumatic valvessee.

Frequently Asked Questions

Is D671H-16C triple eccentric?

This configuration uses a centreline disc arrangement.

Does metal sealing necessarily mean zero leakage?

No, it should be determined based on specific testing standards and product results.

Can the air source pressure be uniformly fixed for 0.4-0.7MPa?

It cannot be used as a unified guarantee value for all executing agencies, and should be confirmed based on actual executing agency data.