Non-Rising Stem Gate Valve
Non-Rising Stem Gate Valve Non-Rising Stem Gate Valve
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Non-Rising Stem Gate Valve

Non-rising stem gate valve is a special type of gate valve where the valve stem is located inside the valve body and is not exposed externally. This design minimizes the risk of contaminating the transported media in pipelines.

Applications

Non-rising stem gate valves can be used in various applications, including water conveyance systems, seawater pipeline systems, gas pipeline systems, food-grade media conveyance systems and weak acid-base transport systems.

Basic Information
Size Range
DN50-DN600
Temperature Range T
0-100℃
Maximum Allowable Operating Pressure PN
1.0-1.6Mpa
Pressure Rating
1.5-2.4Mpa (Shell)
1.1-1.76Mpa (Seal)
Applicable Media
Freshwater, seawater, air, weak acid-base, and so on.
Materials
No. Part Materials No. Part Material
1 Valve Body and Valve Bonnet QT450 6 O-Ring EPDM
2 Valve Disc QT450+EPDM 7 Packing PTFE
3 Valve Stem 2Cr13 8 Bolts Stainless Steel, 45#
4 Valve Stem Nut Aluminum Bronze 9 Nuts Stainless Steel, 45#
5 Gland QT450 10 Valve Handwheel WCB
Specifications
Specifications
Size L H D d c g n-Ød T f
PN10/16 PN10/16 PN10 PN16
DN50 178 241 138 158 125 99 4-Ø18 4-Ø18 17 2
DN65 190 270 173 180 145 118 4-Ø18 4-Ø18 17 2
DN80 203 292 173 196 160 132 4-Ø18 8-Ø18 19 3
DN100 229 333 200 215 180 156 8-Ø18 8-Ø18 20 3
DN125 254 384 230 250 210 184 8-Ø18 8-Ø18 20 3
DN150 267 420 230 280 240 211 8-Ø23 8-Ø23 20 3
DN200 292 512 270 336 295 266 8-Ø23 12-Ø23 21 3
DN250 330 602 350 405 350/355 319 12-Ø23 12-Ø25 25 3
DN300 356 705 350 460 400/410 370 12-Ø23 12-Ø25 28 4
DN350 381 782 450 515 460/470 430 16-Ø23 16-Ø25 28 4
DN400 406 880 480 580 515/525 475 16-Ø25 16-Ø30 28 4
DN450 432 980 600 650 565/585 530 20-Ø25 20-Ø30 29 4
DN500 457 1055 600 670/715 620/650 580 20-Ø25 20-Ø34 29 4
DN600 508 1260 600 780/810 725/770 680 20-Ø30 20-Ø40 38 4
Certifications
Item Standard
Design & Manufacture GB12234
Face to Face Dimension GB12221-89
Flange Connection JB/T-79
Valve Test JB/T-9092
Features
  • Flat Bottom Valve Seat: The soft-sealing gate valve uses a flat bottom design similar to water pipes, which prevents debris accumulation and ensures smooth fluid flow.
  • Integral Rubber Coating: The valve disc is coated internally and externally with high-quality rubber. Advanced rubber vulcanization technology ensures precise geometric dimensions after vulcanization. The rubber is securely bonded to the ductile iron gate plate, preventing detachment, maintaining excellent elasticity, and providing superior sealing.
  • Corrosion Resistance: The valve body is coated with epoxy resin powder, providing corrosion and rust resistance, making it suitable for sewage pipelines.
  • Triple O-Ring Seal: The valve stem features a triple O-ring seal design, reducing friction resistance during operation and significantly decreasing the likelihood of leakage. This design allows for seal replacement without the need to shut off the water flow.
  • The valve is made of ductile iron, making it lighter than traditional gate valves, which facilitates installation and maintenance while providing increased impact resistance.
  • Non-rising stem gate valves have their operating stems located inside the valve body, not exposed to external environments, which makes them suitable for applications where sensitivity to stem contamination is a concern, such as the fluid control in hygienic pipelines.
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