UPVC Electric Butterfly Valve

Size 50mm to 200mm Semi Lugged Table E
Body UV Stabalised PVC
Seat EPDM or FKM
Disc PVC
Pressure 10 BAR
Actuation Electric

• What is an Electric PVC Butterfly Valve?

  An electric UPVC butterfly valve is a butterfly valve that is made of UV stabalised PVC and is designed to clamp between two flanges using the guide holes (these holes are not threaded so we call it a semi lugged design). It has a direct mounted IP67 electric actuator fixed to the valve which conducts its 90 degree turn (open/close). These are a center line butterfly valve design where the center line refers to the location of the disc and shaft in relation to the body (there are other kinds of butterfly valves such as double & triple offset) where it is precisely in the middle. These valves have either an EPDM or FKM seat. The actuator comes with extra limit switches for voltage free end of stroke open/close feedback and a visual indicator.

• How does an Electric PVC Butterfly Valve work?

  A butterfly valve works by the shaft rotating 90 degrees which will take the position of the disc in the flow from open to close (or vice versa). When it is closed a seal will be formed between the disc and the seat effectively stopping the flow of the media. When it is opened again the disc comes away from the seat and when it is fully open sits side (smallest surface area facing) on to the direction of the upstream flow. This 90 degree turn is conducted by an electric actuator which is connected to a shaft which in turn is mated to the disc by a spline. When the actuator is operated by an external relay the shaft will be rotated effectively turning the disc, switching it to its other state (either open or close). It will take anywhere from 8 to 20 seconds for a cycle depending upon the actuator size (it generally gets longer as the actuator size increases with required torque). Once it rotates its required 90 degrees a microswitch on a cam is triggered and power to the motor is shut off. It will then wait for the relay to be switched and the valve will do the same thing in the other direction.

• How long will my Electric PVC Butterfly Valve last?

  Like any valve this depends upon the usage case of your butterfly valve, its environment, media and how many times it is cycled. For instance if it is on a clean wet media, in a clean environment and not cycled regularly the life will be decades. If it is on a corrosive media and in a dry application with a high cycle rate the life will be much shorter. We conduct regular lab testing and 6,000 cycles is a reasonable life cycle depending upon the application. The actuator's life will depend upon how clean the environment is, its correct installation, its duty cycle and electrical supply. Being CE certified they have been tested to 6,000 life cycles for general purpose applications but can last much longer. One common mistake we see is an incorrectly rated cable gland being installed. Our actuators are IP67 which gives you great water ingress protection but it will only be as good as the cable gland installation. You need to bear in mind the duty cycle of the actuator model you are using and do not exceed that eg. (if it is 75% you can use the actuator for 75 seconds with a 25 second down time out of 100 seconds). If you do it can lead to premature failure of the actuator.

• How do I install an Electric PVC Butterfly Valve?

  These wafer butterfly valves are designed to clamp between two flanges. The bolts will pass through from one flange to the other to give the clamping force on the valve and keep it in position. The seat of the valve also forms the gasket on the flanges so there is no need for a secondary gasket. The bolts should be tightened in a diagonal shape to avoid over tightening in one area. For a full list of instructions please visit our butterfly valve installation & maintenance guide. The electric actuator must be wired in accordance with the wiring diagram which is on the front of the actuator and also inside the housing. This varies between models and voltages so if there is any doubt please consult us.

• What are typical uses of an Electric PVC Butterfly Valve?

  These are mainly used in water treatment and corrosive media/environment applications. They can however be used in any application where the media, temperature and pressure are compatible with the valve.

• How long will my product take to get to me? 

  This depends upon where you are based and the freight method chosen. If the express freight option is selected it is usually next day delivery to metropolitan areas in Australia for under 5kg. If free freight has been selected it will go by road freight which can be anywhere from 1 to 10 days depending upon your location. It usually averages 3 days.

• What warranty do I get?

  All of our products come standard with a 12 month warranty. The good news is we have very strict quality controls and all valves leave our warehouse tested (full material and testing certificates to API 598 are available) and inspected so there are rarely any issues. Also once your valve is in and operating it will most likely continue to do so for a very long time.