Woodland Engineers

We offering piston valves. The valve up to the size 6" do not have any stuffing box. The salient feature of this valve is that of the piston operation. The piston slides between the two packing rings made of asbestos / PTFE and do not rotate, hence there is minimum ware. The only warring part is the packing ring and that to after an extensive use. The two packing rings are separated by a ported lantern bush. The bottom ring rests on a cast machined groove of the body and upper packing ring is being held and remained pressed by a bonnet on top. The bonnet rests on the top ring, when tightened evenly by the nut of the stud presses the lantern bush which in turn presses the bottom ring. This is done by keeping the valve in closed position. Thus the mechanism is aligned compressed and ready for operation. Here the bottom ring of the valve serves the purpose of the seat while the upper ring serves the purpose of a gland. The advantage of the valve is when any leakage is observed from the hole of the bonnet, specially provided for this purpose, it can be stopped on the line. This is done by tightening the nut of the bonnet evenly, keeping the valve in closed position. The maximum thickness of the ring is utilized and when the valve cannot be further tightened to stop the leakage, It is only required to replace the sealing rings. This can be done on the line itself.

Pinch Valves is a seatless & glandless valve. Pinch valve is a modified version of laboratory pinch cock. 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.

AN ISO 9001-2000 company, leading manufacturers of chemical process pumps since the last 10 Years has carved for it self a niche in the pumping and fluid control system.