General Features & Highlights

BRIEF DETAILS OF PINCH VALVE

Pinch Valve is a Seat less & Glandless valve.

Pinch valve is a modified version of laboratory pinchcock. A rubber sleeve is protected under a cast iron casting.

The fluid passing through do not come in contact with either body covering or any other metal parts of the valve except the sleeve.

Hence the body and other metal parts are almost permanently not subjected to the corrosive action of the fluid.

The flow through the valve is straight and full as that of a pipeline, when the valve is fully open. Further, the collar of the sleeve eliminates gasket.

The valve is simple hand wheel operated of rising wheel type. Therefore the operation of the valve is just simple as other wheel operated valve.

The in-between stoppage will allow the desired throttling. Thus the valve offers positive control over flowing media.

Applications:

Pinch valve finds its best application in handling corrosive slurry, abrasive media, liquid with solid suspensions and many others, which are difficult to handle with seat valve.

Range:

The flange of the pinch valve can be supplied in accordance to BS, DIN, ASA & IS dimensions The range for the valve is from 15 mm TO 300 mm.

Actuation:

The valve can be supplied with Electrical and pneumatic actuation.

 

	Sr. No. Part Material 1 Body C.I. IS 210 Gr.20-25 (Cast Iron) 2 Pinching Bars C.I. IS 210 Gr.20-25 (Cast Iron) 3 Elastomer Sleeve Natural, Neoprene, Butyl, EPDM, Hypalon. etc 4 & 5 Spindle AISI 410 6 Bridge Cast Steel (C.S) 7 Lug’s Clamp Mild Steel (M.S) 8 Spindle Clamp Gun Metal (G.M) 9 Tie Bars AISI 410 10 Key Mild Steel (M.S) 11 Yoke Bush Gun Metal (G.M) 12 Travel Limit Nut Mild Steel (M.S) 13 Hand Wheel C.I. IS 210 Gr.20-25 (Cast Iron) 14 Hand Wheel Nut Mild Steel (M.S) 15 Lug Clamp Screw Mild Steel (M.S) 16 Set Screw Mild Steel (M.S)
	15 20 25 32 40 50 65 80 100 125 150 200 250 300 S.L 108 124 133 152 165 197 220 260 311 362 412 524 640 760 L 98 114 123 139 150 179 203 240 291 341 388 504 612 730 O wh 86 86 100 115 115 175 175 190 225 270 270 375 480 480 H 169 172 201 212 225 252 285 333 370 466 521 612 738 860

Operating Manual OF PINCH VALVE

THE PINCH VALVE is a modified version of the laboratory pinchcock.  A rubber sleeve is protected under a Cast iron or Aluminum split body casting. The valve is a simple hand wheel operated of rising wheel type. The operation of the valve is same as other hand wheel operated valve, it closes when moved in clockwise direction and opens when moved in anticlockwise direction. The in-between stoppage will allow the desired throttling. Thus the valve offers positive control over flowing media. The flow through the valve is same as that of a pipeline, when the valve is in fully opened condition. Further, the rubber sleeve eliminates the need of a gasket.

PRELIMINARY PRECAUTION :

On receipt of the valve please check the position of the valve, as it is advisable to keep the valve in fully opened condition. Also check the position of the travel limit nut, if found loose then tighten the set screw of the nut.

INSTALLATION :

The valve can be installed without any gasket unless it is required for some specific purpose. Tighten the nut of the flanges evenly & equally, but avoid too much tightening. After installation check the free movement of the upper & lower pinching bar by opening & closing the valve.  The valve is then ready for the service it is installed for.

MAINTENANCE : 

If the valve is found leaking through the seat after sometime even though in fully closed condition, then set the travel limit nut by just taking it 1 or 2 threads above & then tighten. This will allow more room for traveling of rubber sleeve & ensure the valve to zero leakage. This problem sometimes occurs when the sleeve is slightly worn out, when used under abrasive condition. Further, The Rubber sleeve of the valve up to 2” (50mm) have a single lug on either side and it goes into the hollow passage of the pinching bar where it is fixed with the lug clamping screws. In the higher sizes above 2” the sleeves have two lugs on either sides and is fitted overlapping the pinching bar.

DISMANTLING THE VALVE & REPLACING THE RUBBER SLEEVE :

When the rubber sleeve is ruptured or totally worn out then it is to be replaced with a new one. In this case first dismantle the valve by following the instructions.

1.Remove the hand wheel.

2.Open the Tie Bar nuts.

3.Disconnect the spindle from the Horseshoe connection and remove it completely with the

   bridge.

4.REMEMBER not to temper the set screw of the yoke bush, unless if required it should be

   completely tight.

5.Open out the nuts & bolts of the split body of the valve.

6. Remove the screw of  the lugs from both the pinching bars.

7. Now fit the new rubber sleeve & reverse the operation to assemble the complete valve.

NOTE :

It is advisable to keep a spare rubber sleeve for maintenance purpose, considering the self life of the Rubber as six months when packed & stored in dark. The Pinch valves should be stored in fully open condition only. We also offer complete spares of the valves, but request you to place your order a week in.