Product model: CV3000

Valve body material: WCB, 304, 316, 316L 

Material of spool: 304, 316 + STL PTFE 

Seat Material: 304, 316 + STL; PTFE 

Connection mode: flange, thread, welding 

Seat type: single seat, double seat, sleeve 

Cover Type: Standard Type, Low Temperature Type, Heat Dissipation Type, Bellows Sealing Type 

Pneumatic Actuator: Multi-spring Thin Film、Normally Closed (NC) 、Normally Open (NO)

Actuator Accessories: Electrical positioner, air filter pressure relief valve, handwheel, reserve valve

Product Overview
The pneumatic diaphragm cage-guided control valve adopts a cage-guided, pressure-balanced double-seat and single-seat structure. It is a force-balanced control valve. The valve body has a compact structure with an S-shaped streamlined flow passage. Its advantages include low pressure drop, large flow capacity, wide adjustable range, and high flow characteristic accuracy. The control valve is equipped with a multi-spring diaphragm actuator, featuring a compact structure and high output force. It is more suitable for applications requiring good dynamic stability, low noise, cavitation/flashing control, and use under high/low temperature and high-pressure-drop fluid control conditions.

Standard Technical Parameters

• Valve Body Type: Single-seat, Double-seat, Cage-guided

• Nominal Diameter: DN20–DN200

• Nominal Pressure: ANSI 150, 300, 600LB / JIS 10, 16, 20, 30, 40K / PN1.6, 2.5, 4.0, 6.4 MPa

• Connection Type: Flanged: FF, RF, RJ, and LG

• Flange Standard: ANSI B16.5, JIS B2201 / JB/T 79.1 PN1.6MPa, JB/T 79.2

• Threaded: DIN, NPT, RC, BSP, G, etc.

• Welded: GB 12224-89

• Sealing Face Type: PN16 raised face (RF); PN40, PN63, PN100 recessed face (FM)

• Material: WCB, 304, 316, 316L

• Bonnet: Standard type (-20°C to +200°C), Cryogenic type (-60°C to -196°C), Finned (heat dissipation) type (-40°C to 450°C), Bellows seal type.

• Gland Type: Clamp plate type

• Packing: V-type PTFE, flexible graphite

Valve Internals

• Plug Type: Pressure-balanced type

• Plug & Seat: Double-seat plunger-type plug, metal seal, equal percentage characteristic, linear characteristic (LC)

• Flow Characteristic: Equal percentage, linear, quick opening

Actuator

• Type: Multi-spring diaphragm actuator

• Action: Direct action, Reverse action

• Diaphragm Material: NBR reinforced with polyester fabric

• Spring Range: 20–100KPa, 40–200KPa, 80–240KPa

• Supply Air Pressure: 0.14, 0.16, 0.28, 0.40 MPa

Action Types

• Air-to-Close (FO) (with direct-acting actuator): When air supply fails, the actuator spring opens the valve.

• Air-to-Open (FC) (with reverse-acting actuator): When air supply fails, the actuator spring closes the valve.

Accessories (Optional)
Electro-pneumatic positioner, air filter regulator, handwheel mechanism, limit switch, solenoid valve, lock-up valve, and others.

Product Performance

• Rated Kv Value: Refer to table

• Flow Characteristic: Linear, equal percentage, quick opening

• Adjustable Range (Rangeability): 50:1

• Leakage Class: Metal seal: <0.01 (ANSI B16.104-1976 Class IV); Soft seal: <0.00001%

• Hysteresis: <1% of full stroke (with positioner); <3%-5% of full stroke (without positioner)

• Basic Error: <±1% of full stroke (with positioner); <±5% of full stroke (without positioner)