8 Year Exporter Nrs Gate Valve - WZ Series Metal seated OS&Y gate valve – TWS Valve

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8 Year Exporter Nrs Gate Valve - WZ Series Metal seated OS&Y gate valve – TWS Valve Detail:

Description:

WZ Series Metal seated OS&Y gate valve use a ductile iron gate that houses bronze rings to ensure a watertight seal. The OS&Y (Outside Screw and Yoke) gate valve is mainly used in fire protection sprinkler systems. The main difference from a standard NRS (Non Rising Stem) gate valve is that the stem and stem nut are placed outside the valve body. This makes it easy to see if the valve is open or closed, as almost the entire length of the stem is visible when the valve is open, while the stem is no longer visible when the valve is closed. In general this is a requirement in these kinds of systems to ensure a fast visual control of the system status

Material list:

Parts Material
Body Cast iron,Ductile iron
Disc Cast iron,Ductile iron
Stem SS416,SS420,SS431
Seat ring Bronze/Brass
Bonnet Cast iron,Ductile iron
Stem nut Bronze/Brass

Feature:

Wedge nut:The wedge nut is made of copper alloy with lubricating abilities providing optimum compatibility with the stainless steel stem.

Wedge:The wedge is made from ductile iron with copper alloy face rings which are machnined to a fine surface finish to ensure optimum contact seal with body seat rings.The wedge face rings are accurately machined and firmly secured to the wedge.The guides in the wedge ensure uniform closure regardless of high pressures.The wedge has a large throught bore housing for the stem that ensures no stagnant water or impuritiles can collect.The wedge is fully protected by a coating of fusion bonded epoxy.

Pressure test:

Nominal pressure PN10 PN16
Test pressure Shell 1.5 Mpa 2.4 Mpa
Sealing 1.1 Mpa 1.76 Mpa

Dimensions:

"

Type DN(mm) L D D1 b Z-Φd H D0 Weight (kg)
RS 40 165 150 110 18 4-Φ19 252 135 11/12
50 178 165 125 20 4-Φ19 295 180 17/18
65 190 185 145 20 4-Φ19 330 180 21/22
80 203 200 160 22 8-Φ19 382 200 27/28
100 229 220 180 24 8-Φ19 437 200 35/37
125 254 250 210 26 8-Φ19 508 240 46/49
150 267 285 240 26 8-Φ23 580 240 66/70
200 292 340 295 26/30 8-Φ23/12-Φ23 760 320 103/108
250 330 395/405 350/355 28/32 12-Φ23/12-Φ28 875 320 166/190
300 356 445/460 400/410 28/32 12-Φ23/12-Φ28 1040 400 238/274
350 381 505/520 460/470 30/36 16-Φ23/16-Φ28 1195 400 310/356
400 406 565/580 515/525 32/38 16-Φ28/16-Φ31 1367 500 440/506
450 432 615/640 565/585 32/40 20-Φ28/20-Φ31 1460 500 660/759
500 457 670/715 620/650 34/42 20-Φ28/20-Φ34 1710 500 810/932
600 508 780/840 725/770 36/48 20-Φ31/20-Φ37 2129 500 1100/1256

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8 Year Exporter Nrs Gate Valve -  WZ Series Metal seated OS&Y gate valve – TWS Valve detail pictures


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