| Product Description :
||Piston valve is a Seatless & Glandless valve. Piston valve up to the size 6" do not have any stuffing box. The salient feature of piston valve is that of the piston operation. The piston slides between the two packing rings made from specially imported material 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.