Product category

Yoshitake Isolation Valves / Butterfly Valves

BFV and KBFV series butterfly valves for compact isolation and automated control on larger pipe sizes.

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Model comparison

Compare only the points that determine the choice: function or construction, applicable medium, operating range, body material, and connection or nominal size. Open the model page to confirm the full specification.

Model	Key selection point	Medium	Operating range	Body material	Connection / size
BFV-1S	Stainless Steel Butterfly Valve	Steam, air, water, oil and other non-dangerous fluids	—	Stainless steel	Wafer (JIS 10K, ASME Class 150 / ANSI 150lb, EN PN16); 50-300A, Wafer connection, Stainless steel body
DBFV-1S	Electric Butterfly Valve	Steam, air, water, oil, and other non-hazardous fluids	—	—	Wafer (JIS 10K, ANSI 150lb, EN PN16); 50A-80A: DA50 Actuator; 100A: DA80 Actuator; 125A-150A: DA200 Actuator
KBFV-1S	Pneumatic Butterfly Valve	—	0.4 to 0.8 MPa	Stainless steel	Wafer (JIS 10K, ANSI 150lb, EN PN16); 50A: KA50 Actuator; 65A: KA50 Actuator; 80A: KA75 Actuator; 100A: KA110 Actuator; 125A: KA160 Actuator; 150A: KA255 Actuator
MD-71	Emergency Shut-off Valve System	Tap water / City water	0 - 1.0 MPa 5 - 60°C	—	Emergency shut-off butterfly valve
MD-71-N	—	Tap water / City water	0 - 1.0 MPa 5 - 60°C	—	Emergency shut-off valve (complying with JWWA)
KS-5	—	Tap water / City water	0 - 1.0 MPa 5 - 60°C	—	Emergency shut-off valve control panel

Process scope

Yoshitake butterfly valves provide compact shutoff for larger line sizes, with manual wafer patterns and a motorized city-water version in the local catalogue. Seat material, flange interface, and the suitability of the valve for throttling or isolation must be confirmed for each installation.

Project-specific checks

Confirm whether the application is isolation or control and identify the allowable pressure drop.
Match flange standard, wafer dimensions, line size, and actuator/lever clearance.
Check seat compatibility with temperature, medium, and cleaning chemicals.
For motorized service, provide voltage, operating time, control signal, and loss-of-power requirement.

Final verification

This guide groups local Yoshitake catalogue pages for preliminary engineering review. The model-specific Yoshitake documentation, sizing calculation, materials confirmation, and applicable site requirements control the final order and installation decision.