Single-seated Control Valve
Single-seated Control Valve
Brief Description

Type 5611 single-seated control valve is made up of multi-spring pneumatic diaphragm actuator and low flow resistance of single-seated control valve body, Multi-spring thin membrane actuator’s function is low height, light weight, simple equipment, Body f



Type: Single-Seated ball valve

DN: 15-250mm

PN:PN1.6、4.0、6.4MPa ,ANSI125、150、300、600;

Connection: Flange, BW, SW(Optional, for DN15-DN50) 
Body Material: WCB,WC6,WC9,C5, CF8,CF8M etc.


Bonnet Type: Standard type(P):-17~+230℃

          Elongation type(E1): -45-17℃、+230-600℃

Elongation type(E2): -100-45℃

Elongation type(E3):-196-100℃

Radiation fin is available for option
Gland type: Bolt pressing type
Packing: PTFE (V-shape), Teflon asbestos and flexible graphite


Valve trim

Valve disc:Top guiding single-seated plunger valve disc

Control characteristic: Equal percentage, linear, quick open

Trim material:304,304 overlay STL, 316,316 overlay STL, 316L,17PH etc.-



  1. Pneumatic-actuator

Type 6100 Pneumatic Diaphragm Actuators

Membrane material: Ethylene propylene rubber filled with nylon

Spring range: 20-100KPa、40-200KPa、80-240KPa

Air supply pressure: 140KPa、160KPa、280KPa、400KPa

Air supply connection:Rc1/4、Rc3/8

Environment Temp: -30-+70℃

Acting type: air open ( reverse acting), air close (positive acting)


Note: (1) The type of large diameter or high pressure difference control valve can also be equipped with 6400 series straight stroke piston actuator.
(2) if the environment temperature below 30 ℃, please contact with Cepai engineers.

(2)Electric actuators

Type: 6200 series electric actuators

Voltage: 220V、380V

Environment Temp: -30-+70℃

Control Signal: 4-20mADC(supply 4-20mA signal feedback as per customer requirement)


Leakage rate: Metal seat:accordance with ANSI B16.104IV level which is less than 0.01% of rating CV.  

Nonmetal seat: accordance with ANSI B16.104IV level which is less than 10-7 of rating CV.

Adjustable: 50:1(Optional 100:1)

Variation:±1%( with positioner) ±3% (no positioner)

Linear: ±2%( with positioner) ±5% (no positioner)

Accessories ( As per requirements)

Positioner, Filter Regulator, hand wheel, limit switch, solenoid valve, valve position transmitter, pneumatic valve, speed increaser, lock up valve etc.