Parameters Required for Control Valve Sizing & Quotation
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Update time:2026-03-12
Process Conditions (Core)
- Service Medium
- Medium: water, steam, air, natural gas, oil, acid, alkali, slurry, etc.
- Particulate content, corrosiveness, crystallization tendency
- Temperature
- Normal, maximum and minimum operating temperature
- Pressure
- Normal operating pressure
- Maximum inlet pressure P1
- Outlet pressure P2
- Pressure drop ΔP across valve
- Flow Rate
- Normal, maximum and minimum flow rate
- Unit: m³/h, t/h, kg/h, Nm³/h, etc.
Valve Body Parameters
- Nominal Diameter (DN)
- Pressure Class
- PN16/PN25/PN40/PN63 or Class150/300/600
- Valve Body Material
- WCB, 304, 316, 316L, Hastelloy, titanium, PTFE lined, rubber lined, etc.
- Trim Material (plug, seat, stem)
- 304, 316, 316L, Stellite overlay, Hastelloy, etc.
- Packing
- V-type PTFE, flexible graphite, stainless steel bellows, etc.
- Leakage Class
- Class IV, V, VI (bubble-tight shutoff)
Structure & Flow Characteristic
- Valve Type
- Globe single-seat, double-seat, cage, three-way, angle, butterfly, ball, diaphragm, etc.
- Flow Characteristic
- Equal percentage / Linear / Quick opening
- Flow Direction
- Flow open / Flow close
- Connection Type
- Flanged, welded, threaded, clamped
- Special Requirements
- Jacketed for heating / Cooling fin / Bellows seal
- Actuator
- Type
- Pneumatic diaphragm / Pneumatic piston / Electric / Hydraulic
- Action Mode
- Air-to-open (FO) / Air-to-close (FC)
- Air Supply Pressure
- 4～0.6 MPa or others
- Explosion-proof Requirement
- Ex d II CT4 / Ex ia, etc.
Accessories (Directly Affect Price)
- Valve Positioner (smart/mechanical)
- Solenoid Valve
- Filter Regulator
- Limit Switch (Feedback)
- Handwheel
- Lockup valve, booster, amplifier
Signal & Standards
- Control Signal
- 4～20mA / HART / FF / Profibus
- Executive Standards
- GB, HG, API, IEC, ANSI, etc.
- Material Certificate & Hydrostatic Test
- Shell test, seal test
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