Butterfly Valve (Cast Iron, Gear, 10K)

Model: PMV-26(FC,Gear)

PMV-26(FC,Gear) is a butterfly valve combining a cast iron body with a SUS304 disc, EPDM seat, and a gear-operated manual operator. With a short face-to-face dimension, concentric construction, and 10K pressure rating as standard, it is used for large-bore manual shutoff lines in the water/wastewater, construction, and plant sectors.

Features

• Short face-to-face distance enables installation in confined spaces
• Simple structural design with low defect rate
• Quick open/close for effective fluid control
• High tightness and durability
• Concentric structure with low torque

Specifications

Frequently Asked Questions

How do I choose between gearbox and lever operation?

Lever operation completes a 90° stroke in a single handle movement - fast and simple. A gearbox reduces operator torque through a reduction gear, making it suitable for large-bore valves, high differential pressure lines, or sections requiring precise position holding. A gearbox is generally the standard choice for 200A and above.

How do I choose between cast-iron and stainless steel bodies?

Cast-iron bodies offer excellent cost competitiveness and are the standard choice for large-bore lines carrying low-corrosivity fluids such as general industrial water, treated water, and HVAC water. For high chloride concentrations or strongly acidic/alkaline fluids, a stainless steel (SUS304 or higher) or ductile iron specification should be considered.

Can the valve be converted to actuated operation?

By removing the gearbox and attaching a pneumatic or electric actuator to the ISO5211 direct mounting pad, the valve can be converted to automated operation without body replacement. This is a suitable platform for phased automation of large-bore lines - starting with manual gearbox operation and adding an actuator when remote control is later required.

Is partial-opening operation possible?

A gearbox operator can maintain the disc at a desired position with precision, making it suitable for partial-opening operation. However, butterfly valves have an inherently non-linear relationship between disc rotation angle and flow rate, with the 30°-70° range being the practical throttling zone. For sections requiring continuous precise flow regulation, a globe control valve should be considered.