Manual Cast Steel Knife Gate Valve

  • Detail
  • Parameters
Model
SZ47F Series
Caliber
DN40~DN500(mm)
Conveyed medium
water, oil, steam, corrosive liquids.
Pressure range
1.0~6.4MPa
Flow - through material
Carbon steel, stainless steel, etc.
Operating temperature
carbon steel ≤ 425℃; stainless steel ≤ 600℃
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Features
1.Integral valve body design minimizes fluid resistance for smooth operation.
2.Double - plane bearing in screw drive reduces friction for effortless actuation.
3.Floating seal seat with O - ring preload ensures tight closure, minimizes leakage, and auto - compensates for wear, extending service life.
4.Fixed guide claws and groove - less design prevent media buildup and jamming.
5.Valve seat based on media/conditions. Gate plate features hard chrome plating or ion nitriding for enhanced wear resistance and sealing durability.
Parameters
Nominal DiameterDN50—DN1200
Nominal PressurePN1.0~1.6(MPa); 150LB; 10K
Connection TypeWafer, Flanged, Lug
ActuationHandwheel, Bevel Gear, Chain Wheel
Working PressureDN50~DN250: 10kg/c㎡
DN300~DN400: 6kg/c㎡
DN450: 5kg/c㎡
DN500~DN650: 4kg/c㎡
DN700~DN1000: 2kg/c㎡
Flange StandardsGB9113.1-2000; JB/T79.1-1984; HG20592-1997;
ASME B 16.5; EN 1092-1:2001
Face-to-FaceGB/T15188.2-94; MSS SP 81-2001
Pressure-Temperature RatingGB/T12224-2007; ANME B 16.34-2003; ISO7005-1
Testing Standards- Strength & Sealing: JB/T9092-1999
- Metal Seal Class: MSS SP 91-2001 (40ml/inch)
- Soft Seals (NBR/EPDM/PTFE): 1/10 leakage rate of metal seal
Temperature Range- Seat:
NBR≤80℃; EPDM≤120℃; PTFE≤180℃; Stainless Alloy≤450-900℃
- Body:
Carbon Steel≤425℃; Stainless Steel≤600℃; 2520 Stainless≤900℃
ApplicationsSuitable for coal washing/slag discharge in mining power plants, urban wastewater treatment, food, paper, pharmaceutical, petroleum, chemical industries, etc. Used in oil, water, steam pipelines to control media such as cement slurry, gold ore powder, ore sand, slag, coal slurry, paper pulp, wood pulp, tailings, fibers, dust, chemical wastewater, sedimentation tanks, asphalt, silo outlets, fruit juice, grains, slaughterhouse wastewater, etc.