D91F-25

🌎 Brand: 上海高压阀门厂
Fire Safe Anti-Static

Specifications

Valve Type ID d7d67555-64ef-4b43-9620-2a3788065572
Size Range DN40-DN200
Pressure Rating PN1.6-PN8.0
Temperature Range -60°C to 400°C
Body Material cast iron
Trim Material copper alloy
Seal Material ceramic
Stem Material carbon steel
End Connection wafer
Standard API
Operation Method gear
Flow Coefficient (Cv) 1893.79
Leak Rate zero leakage
Applicable Media air
Applications air
Industry Tags pharmaceutical
Test Pressure 185
Design Pressure 8
Design Standard API
Design Temperature 400
Body Material Grade WC6
Weight (kg) 1575
Specifications compiled from manufacturer technical datasheets.

Engineer's Selection Guide: Control Valves

Control valves modulate flow in response to a control signal to maintain a process variable. Selection involves sizing for the required Cv, choosing the trim and body style, defining the flow characteristic, and specifying the actuator and positioner. Leakage class per FCI 70-2 should be specified for the duty.

Frequently Asked Questions

Q: What is a control valve used for?

A: Control valves regulate process flow, pressure, level, or temperature by modulating the flow path in response to a controller signal.

Q: How are control valve leakage classes defined?

A: Leakage is typically classified per FCI 70-2 / IEC 60534-4, ranging from Class I (no test) to Class VI (tight shutoff, bubble-tight for soft seats).

Guidance reflects general engineering practice for control valves; confirm against the project specification and applicable standards before procurement.

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