Application:- Pressure Relief Valve (P.R.V.) is a safety device to used in Transformer, Pressure Tanks & Lines for indoor & outdoor application. Suitable for repeated operation, than conventional Explosion Vent. Engineered for rugged use & long life each P.R.V. is checked for its operational condition individually

Mounting

                   P.R.V. can be mounted both horizontally & vertically by help of 4 mounting holes in Aluminum Casted Body for M10 Bolts at p.c.d. of 127 mm.

Working

               Port of approximately 70mm. is sealed by Stainless Steel Diaphragm resting on an “O” Ring. Stainless Steel Spring Set keeps the port closed in normal condition. As soon as the pressure exceeds the pre determined safe limit. The diaphragm gets lifted from the seat. This exposes the tank pressure to a greater area, corresponding to the diameter of side gasket, thus sudden increase of force. Thus instantaneously opens port. and allowing vapor, gas & liquid to flow out of tank. The diaphragm restores its normal position as soon as pressure drops below the set limit and is ready for second jump. Lift of diaphragm also operates the Limit Switch (Double Pole/ Double Throw type) &Visual Indicator (Flag) by help of Rod. Limit Switch is attached with ¾ “* 16 T.P.I.  (B.S.C.) Cable Gland  of PVC.

         . Depending upon the tank fluid different “O” Ring material is suggested. Operating pressure 0.42 / 0.49/ 0.56/ 0.63/ 0.70 kg/cm sq. (±0.07 Kg / cm sq.) i.e. 6 / 7 / 8/ 9/ 10 ± 1 p.s.i.  

We manufacture  P.R.V. of different higher pressure.

         Note: - Our standard feature is PRV with Nitrile Rubber Gasket.

• Limit Switch confirms to weather protection IP-67 with (1 N.O.+ 1 N.C.) / (2 N.O.+ 2 N.C.) Contact

Different Models available are 

1. Without (Electrical Contact & Visual Indicator)                                   (DP-3)
2. With (Electrical Contact (1 N.O.+ 1N.C.) & Visual Indicator)             (DP-3EF 1)
3. With (Electrical Contact (2 N.O.+ 2N.C.) & Visual Indicator)             (DP-3EF 2)
4. These models are also available with VITON Rubber Gasket, suitable for Silicone Oil.
5. With Electrical Contact having Push- Pull Type Connectors  (1 N.O.+ 1 N.C.) / (2 N.O.+ 2 N.C.)
6. Vent screw for bleeding air or gas bubbles.
7. PRV at different operating pressure (higher/lower) can be supplied as per your request.

Routine Test-is carried on each P.R.V. as follows and test certificate furnished along with supply.

1. Operating Pressure individually.
2. Contact / Operation of Switch & Flag is checked in Before & After Valve Operation condition.
3. Leakage Test at 75% of Operating Pressure for 12 hr is done.
4. Dielectric Test of 2 K.V.  for 1 minute.

                   P .R.V. satisfies Environmental Test IP 67 Test Condition.

Due to our policy of continuous product improvement, dimensions and design are subject to change.