UV Stabalised 3 Way Spring Return PVC Ball Valve

Size 1/2" to 2" BSP & Solvent Weld
Body UV stabalised PVC
Seat PTFE
Pressure 10 BAR
Temperature Ambient
Actuation Spring Return Pneumatic

• What is a 3 Way PVC Spring Return Pneumatic Ball Valve?

  A three way UPVC spring return ball valve operates on the same principle as a two way double acting pneumatic ball valve but instead of a complete isolation or completely open (2 states, closed or open) it will have one line open and one line closed. It is important to note that during its 90 degree turn from one line to another there is a point where all lines are partially open to each other, even though this is for a very short period of time (the time for one cycle depends upon the size of the actuator, your air pressure and 5/2 valve size but is usually a second or so in the smaller sizes and a few seconds in the bigger sizes). The 3 way ball valve itself is made of UV stabalised PVC with a mounted anodised aluminium rack and pinion actuator. The size of the actuator will get bigger with the size of the valves as the torque required increases. We match all of our actuators with at least a 30% safety margin in torque for the spring when it is fully extended so you know it will have enough torque to return to your fail safe position with no air. There is a choice of a L or T port configuration in the ball valve and threaded or solvent weld ends. They all have PTFE (teflon) seats with either EPDM or FKM seals.

• How does a 3 Way PVC Spring Return Pneumatic Ball Valve work?

  The 3 way ball valve will work by the spring return actuator rotating the ball 90 degrees in the valve. This will be in a clockwise or anticlockwise direction depending upon the actuator involved (ours usually open anti clockwise). The actuator itself is controlled by a 5/2 valve (either solenoid or manual) where air will be put into one side of the pistons and exhausted out the other side, allowing the actuator to rotate 90 degrees (in turn rotating the ball). It can also be controlled by a 3/2 valve as the actuator is spring return, air can be used to open the valve (or vice versa) and the spring force to close it once the air is exhausted. We always recommend using a 5/2 valve however as that way you can ensure clean air is being delivered to your actuator which will help it last a lot longer.

• How long will my 3 Way UPVC Spring Return Ball Valve last?

  This depends upon the usage case of your valve, its environment, media, supply air cleanliness and how many times it is cycled. For instance if it is on a clean 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. The actuators life will depend upon how clean and dry the supply air is (the air that makes the actuator operate) however we test these to over 800,000 cycles. Install a basic air filter if you are not sure about the quality of your air, we have pneumatic actuators that have been in operation for decades.

• How do I install a 3 Way PVC Spring Return Ball Valve?

  Before installation the line should be isolated and pressure removed. The valve can be installed in any orientation so choose the best for ease of access for maintenance. The end connections will depend upon weather you have chosen threaded or solvent weld. The actuator can accommodate a namur solenoid valve which is a very popular configuration (the 5/2 control valve bolts directly onto the actuator with an o-ring face seal on the back of the valve) or just a standalone 5/2 valve. If you are using a stand alone 5/2 valve, the air lines will need to be run from here into the ports on the actuator (remember the longer the run the slower the operation unless you use quick exhaust valves near the actuator). A 3/2 valve can also be used by running the air into the open port on the actuator. If this method is chosen we would recommend a silencer or exhaust regulator silencer in the unused port as it will help filter out suspended solids being sucked into the actuator from the surrounding environment.

• What are typical uses of a Three Way Spring Return PVC ball valve?

  These three way PVC spring return ball valves are used mainly on water treatment or chemical dosing/sampling applications. The common theme though is where either a diversion (switching from one line to another) or isolation of one line to change over to another is used. Being double acting they are not really used on fail safe applications as you would want a spring return actuator in this instance (if you lose air the mechanical spring will turn the valve to your fail safe position).

• 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 API598 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.