Product Category
Industrial Control Valves
Pneumatically and electrically actuated control valves for precise process regulation of flow, pressure, temperature, and level. From globe control valves to rotary valves — with smart positioners and fieldbus integration.
What is a Control Valve?
A control valve is a power-operated valve that receives a signal from a process controller and modulates fluid flow to maintain a set process parameter — flow rate, pressure, temperature, or level. The valve is typically actuated by compressed air (pneumatic) or an electric motor, and includes a positioner that accurately positions the valve stem in response to the control signal.
Control Valve Types
Linear (Globe) Control Valves
- Single-seated globe: Tight shut-off, used where leakage is critical. Standard for most process applications.
- Double-seated globe: Balanced plug design for lower actuator requirements at high pressures. Not tight-shutoff.
- Cage-guided (balanced plug): Reduced actuator forces through pressure-balancing holes. The industry standard design (Fisher Cavitrol, SAMSON Type 3241).
- Angle body: Flow enters from below and exits at 90° — used to avoid solids buildup and for flashing/cavitating services.
Rotary Control Valves
- Butterfly control valves: High-Cv, large-diameter flow control — economical and compact.
- Ball control valves (V-port): V-shaped ball for flow characterisation — good rangeability and high Cv.
- Eccentric rotary (Camflex): Eccentric disc design providing tight shut-off and high rangeability — used in oil & gas (Masoneilan Camflex).
Severe Service Control Valves
For applications with cavitation, flashing, high pressure drop, or abrasive/erosive media — special trim designs are required:
- Anti-cavitation trim (Fisher Cavitrol, SAMSON ANTICAV)
- Multi-stage pressure reduction (IMI CCI DRAG, SAMSON NELES)
- Low-noise trim for high-pressure gas service
- Cryogenic control valves (LNG, liquid nitrogen/oxygen service)
Positioners & Smart Valve Technology
Modern control valves are equipped with smart digital positioners that provide precise positioning, feedback, and diagnostics. Key brands and positioner models:
- Fisher FIELDVUE DVC6200: Industry-leading smart positioner with AMS and HART communication.
- SAMSON TROVIS 5760/5761: Digital positioner with HART, PROFIBUS, FOUNDATION Fieldbus.
- Masoneilan SVI II AP: Smart valve interface positioner.
- Rotork Fairchild / YTC / Topworx: Various electro-pneumatic positioners and I/P transducers.
Control Valve Brands We Supply
| Brand | Key Models / Series | Specialty |
|---|---|---|
| Fisher (Emerson) | ED, EW, EZ, HP, ET, easy-e, Cavitrol | World's largest control valve brand. All types and severe service. |
| SAMSON AG | Type 3241, 3251, 3267, 3510 | German precision. Self-actuated regulators and control valves. |
| Masoneilan (Baker Hughes) | 21000 series, 35000 Camflex, 41000 LO-DB | Control valves & positioners for severe refinery service. |
| Flowserve Valtek | Mark One, Valdisk, FlowTop | Globe and rotary control valves for process industries. |
| IMI CCI | DRAG, HP Series, LNG Series | Severe service — power, LNG, refinery. |
| Severn Glocon | Model F, D, G | Severe service, cryogenic, anti-surge control valves. |
| Spirax Sarco | PC, ST series | Steam and condensate control valves. |
Frequently Asked Questions
What information do I need to specify a control valve?
To size and specify a control valve, you typically need: fluid type, inlet pressure (P1), outlet pressure (P2), temperature, flow rate (min/normal/max), required Cv or Kv, line size, flange rating and facing, body material, trim material, shutoff class (ANSI/FCI), actuation type (pneumatic/electric), control signal (4–20 mA, HART, fieldbus), and any special requirements (fire-safe, ATEX, SIL rating). Send us a process data sheet and we will complete the sizing.
Can PartnerValves supply Fisher control valves?
Yes. We supply Fisher control valves from the full range including ED, EW, EZ, HP, ET, easy-e, and specialty severe-service trims. We also supply Fisher FIELDVUE DVC6200 and DVC6100 digital valve controllers, and Fisher actuators (667, 657, 1051, 1052 spring-and-diaphragm types and 1061 piston actuators).
What is the difference between HART and FOUNDATION Fieldbus control valves?
HART (Highway Addressable Remote Transducer) is a legacy digital communication protocol superimposed on the standard 4–20 mA analogue signal. FOUNDATION Fieldbus (FF H1) is a fully digital protocol allowing multi-variable communication and function blocks within the field device itself. FF is used in modern DCS systems for advanced process control. Most modern positioners support both protocols. We supply positioners and control valves compatible with both HART and FF.