COVNA Products

COVNA 2W21 Plastic PVC Water Solenoid Ball Valve

COVNA 2W21 series plastic solenoid ball valve, the action mode is direct pull diaphragm type, the switch mode can be normally open, the valve body material can be brass, stainless steel, characterized by large flow, zero pressure start, widely used in the automatic control of pipeline fluid with zero pressure differential start. It applied to low pressure system. Available in 12vdc, 24vdc, 110vac and 220ac.
COVNA provide solenoid valve in stainless steel, pvc and brass material in all pressure and all voltage.

  • Model: 2W21 PVC
  • Size Range: 1/2”~2”
  • Pressure Range: 0.0MPa-1.0 MPa
  • Material: Brass, Stainless steel, UPVC

Contact Us

COVNA 2 Way 2 Position Direct Acting Diaphragm Solenoid Ball Valve

  • Features: Zero Leakage, Waterproof, High Pressure, High Temperature, etc
  • Size Range: 3/8″ to 2″. Special size could be customized.
  • Material: Brass, Stainless Steel and Plastic
  •  Suitable Medium: Water, Oil, Air, Gas and so on
  • Light weight, low cost and durable. Widely used in car wash system, water treatment, and other applications.
  • Pressure Range: Normal Pressure(0-10bar), High Pressure(0-250bar)
  • Temperature: Normal Temperature(-10℃~80℃), Medium Temperature(-10℃~120℃), High Temperature(-10℃~180℃)

solenoid valve parameters

Port Size 3/8”, 1/2″, 3/4″, 1″, 1¼”, 1½”, 2″ Orifice(mm) 15, 20, 25, 32, 40, 50
Port Connection BSPP,BSPT, NPT, Flange Function Normally closed or opened
Pressure 0.00MPa-1.0MPa Voltage DC-12V, 24V, AC-24V, 120V, 240V/60Hz; 110V,220V/50Hz
Temperature of media NBR Seal: 0~80℃ 

EPDM Seal: 5~190℃

 Suitable Media Alkali Acid and salt etc
Material UPVC, CPVC Sealing Material EPDM, VITON,NBR, PTFE
Coil YC1B , 15W ( AC ) , 16W ( DC )
Coil YELB, start at 200W, maitain at 5W(AC),28W(DC)
Coil YF1B, start at 350W, maitain at 10W(AC), start at 75W,maitain at 25W(DC)

solenoid coil

2w21 solenoid valve dimension

company certificates

company certifications

Port Size 3/8”, 1/2″, 3/4″, 1″, 1¼”, 1½”, 2″ Orifice(mm) 15, 20, 25, 32, 40, 50
Port Connection BSPP,BSPT, NPT, Flange Function Normally closed or opened
Pressure 0.00MPa-1.0MPa Voltage DC-12V, 24V, AC-24V, 120V, 240V/60Hz; 110V,220V/50Hz
Temperature of media NBR Seal: 0~80℃ 

EPDM Seal: 5~190℃

 Suitable Media Alkali Acid and salt etc
Material UPVC, CPVC Sealing Material EPDM, VITON,NBR, PTFE
Coil YC1B , 15W ( AC ) , 16W ( DC )
Coil YELB, start at 200W, maitain at 5W(AC),28W(DC)
Coil YF1B, start at 350W, maitain at 10W(AC), start at 75W,maitain at 25W(DC)
The actuator on my automated valve operates, but the valve won’t turn. Why?

Most likely the valve stem or actuator coupling is broken.

The electric actuator limit switches or the pneumatic actuator position stops are not correctly adjusted.

Probably because there is no air pressure to the solenoid or dirt has jammed it. Also, debris might be trapped inside the valve. Or, the air pressure is not sufficient to operate the actuator. Remember: measure air pressure at the actuator, not at the compressor.

Maybe. First, be sure that the actuator torque output is sufficient to turn the valve reliably. Second, you will have to fabricate a custom mounting bracket and coupling to connect the actuator to the valve.

The valve will stop somewhere between full open and close. When power is reapplied to the original circuit, the actuator will complete the cycle.

To make the change just remove the actuator from the valve and turn it, or the valve stem, 90 degrees and remount the actuator.

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Check the electric wiring schematic that came with the actuator for the correct hookup. Sometimes a copy is inside the actuator cover. If it is missing, don’t guess about the connections. Call the manufacturer for a schematic.

The actuator is wired incorrectly (check the schematic accompanying the actuator), or the external control switch is not the correct type for the actuator.

Not unless you bought it with an optional speed control.

Actuators and solenoid valves require different types of electrical control switches. SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic for the correct wiring and switch type.

Still have confused? Contact Us!
Contact Us

Related Products
COVNA WCB Flange Type Wedge Gate Valve
COVNA AT56 Series Industrial Air Operated Valve Actuators
HK59-D-G Series 4 inch Metal Seated Pneumatic Actuator Operated Butterfly Valve
Intelligent Multi-turn Motorized Globe Valve

Contact Us

Please enable JavaScript in your browser to complete this form.