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Special requirement code: Body, bonnet--jointed structure (default) Hs –body ,bonnet welded structure Ps—pressure sealed structure D—low temperature valve B—bellows valve E—body extended—end valve
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Valve type code: Z—Gate valve
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Driving manner code: 4—spur gear transmission 5—bevel gear transmission 6—Air driving 6s—Take pneumatic type 7—hydraulic driving 9—electric driving(Hand wheel driving omitted) 9B—explosion electric driving
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Connection type code: 1-Interior whorl 2—other whorl 4—flange 6— welding 8-Socked welding
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Design feature code: 1— single-disc 2— double disc
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Structure manner code: W-non diversion hole type(diversion hole type omitted) P-light-duty
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Sealing formation code: Y—hard alloy H—alloy steel
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Pressure grade code: pound grade in practical number
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Body material code:
(1) Cast the valve body:
C-WCB I-WC6、ZG1Cr5Mo V—WC9 ZG20CrMoV P—CF8 ZG1Cr18Ni9Ti R—CF8M ZG1Cr18Ni12Mo2Ti S-CF3 L—CF3M F—LCB N—LC3
(2) Forge the valve body: C—A105, E—LF2, A—F11, V--F22, P--F304 R—F316, S—F304L L—F316L
Product design features
Flange ends cast steel gate valve are used to cut or connect the pipe media under nominal pressure between class150-2500, working temperature≤600°C, in oil industry, chemical industry, fossil-field power plants.
The main structure features include:
1. Both design and manufacture are carry out strictly fellow API600 and API602. The products feature a reasonable structure, reliable seal, good performance and nice modeling.
2. Co hard alloy welded sealing surface, which is wearing resistance, erosion proof, abrasion proof and long-lived.
3. The surface and the adjusting media of the valve shaft are nitrogenized so that it is erosion and abrasion resistance.
4. Class≥900LB, the media cavity uses a self-tightening sealing structure to have the sealing performance reinforced along with the pressure rise so as to ensure the sealing performance.
5. There is backward sealing structure in the valve, so the sealing is reliable.
6. The material of the filling and the flange size can be chosen and the matched according to the applications and the requirement of the wier’s. That can satisfy all kinds of working requirements.
Main parameter of the products
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Serial models
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(HS、PS)Z11H、（HS、PS）Z11Y、(PS)Z41H、(PS)Z41Y、(PS)Z441H、(PS)Z441Y、(PS)Z541H、(PS)Z541Y、(PS)941H、(PS)941Y
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Pressure grade range
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Class 150 -- 2500
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Drift diameter range
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1” to 40”
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Driving manner
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Hand wheel driving
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Gear driving and electrical driving
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Scope of application
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Class 150-300
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Class 400-600
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Class 900-2500
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2” to 40”
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1/2” to 24”
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1/2” to 12”
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1/2” to 10”
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Products performance specification
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Pressure
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Testing pressure at constant temp. (MPa)
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Applicable temperature
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Applicable medium
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Shell test
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Seal test
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Back seal test
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Water, oil, steam, etc.
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Pound grade (class) lbs
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150
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3.0
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2.2
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2.2
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-196–600℃
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300
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7.5
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5.5
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5.5
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600
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15.0
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11.0
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11.0
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900
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22.5
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16.5
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16.5
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1500
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37.5
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27.5
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27.5
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2500
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63.0
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46.2
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46.2
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