gate valve ； CLASS150--2500 gate valve ;
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 30000 pc/month
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Item specifice
Standards
Design and Manufacture: Cast steel gate valve to API 600(ISO10434)or API 6D(IS014313) Cast stainless steel gate valve to API 603 or API 600(IS010434) Forged steel gate valve to API 602.
Inspec tion and Test: API 598, API 600 or API 6D
End flange dimension: ASME B16.5(for NPS<24): ASME BI6.47 series B API 605 or ASME B16. 47 series A. MSS SP-44 (for NPS> 24)
BW end dimension. ASME B16.25
Socket-weld dimension. ASME B16.11
Face to face and end to end. ASME BI6. 10
Pressure-temperature ratings: ASME B16. 34.
Design of Disc
Gate Valves with NPS=2 are of flexible wedge gate; Gate valves with NPS 2 are of solid wedge gate
Body and Bonnet Connection
The body and bonnet of Class 150-Class 900 gate valves are usually bolted bonnet design. And Class 1500-class 2500 gate valves are usually of pressurized seal design
Gasket of Cover Flange
Carbon steel or stainless steel flexible graphite combined gasket is used for Class 150 gate valve; Stainless steel flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel flexible graphite wounded gasket is used for Class 600 gate valve, and ring joint gasket is also optional for Class 600 gate valve; Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class 1500 --class 2500 gate valve.
Actuation
Hand wheel or gear box is usually used for gate valve actuation. Chain wheel and electric actuator can be also used for gate valve actuation if being requested by the customers
Packing Seal
Molded flexible graphite is used for packing material. PTFE or combined packing material can be also used if being requested by the customer. The intenal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish (Ra 3.2 m). The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness (Ra 0.8 m )and ensure the reliable tightness of the stem area
Belleville Spring Loaded Packing Impacting System
If being requested by the customer, the Belleville spring loaded packing impacting system can be adopted for enhancing the durability and reliability of the packing seal
Back Seating Design
All our gate valves have the back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat. For stainless steel gate valve, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of AP 600, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing
Seat
For carbon steel gate valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS 10 gate valves, and welded on seat can be also optional if being requested by the customer. Welled on seat is used for NPS 10 carbon steel gate valves. For Stainless steel gate valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel gate valve if being requested by the customer
Stem Design
The stem s of integral forged design. The minimum diameter of the stem shall per the standard requirement.
The connection of the stem and disc is T type. The strength of the connecting area is bigger than that of the T threaded part of the stem. The strength test of that area conforms to API 591
Stem Nut
Usually, the stem nut is made of ASTM A439 D2. it is also can be made of copper ally if being requested by the customer. For large sized gate valves( NPS 10 for Class 150, NPS 8 for Class 300, NPS 6 for Class 600, NPS 5 for Class 900), rolling bearing is fitted at the two sides of the stem nut in order to minimize the open and close torque of the gate valve
Special Gate Valve
Besides the common gate valves, my Company also makes cryogenic gate valve, Jacketed Gate Valve, Bellow Sealed Gate Valve, Extension Stem Gate Valve for underground application, Flat Gate Valve, etc.
- Q:What is the difference between the model z81x-16q and z81x-16c of the groove gate valve?
- Not 16qIs 16p, the former body is stainless steel, and the latter body is carbon steel
- Q:Valve flange drawing n- up to what
- A bolt hole used to indicate a flangeThe value of N indicates the number of bolt holesUp to the numerical representation of bolt hole size
- Q:What do you mean by "2" and "200 CF8M"?
- CF8M is stainless steel, and 2 is caliber 50200 and should also be bore
- Q:What's the meaning of the gate valve model z41x 16Q?
- Gate valve (Z) flange connection (4) wedge type single gate (1) rubber soft seal (X) -16 pressure) (Q)
- Q:Acid resistant alkali valve gate valve
- D is small in shape and beautiful in appearance.E operation is simple and labor-saving.
- Q:Z45T-10 what kind of material is the gate valve?
- JB/T 308 regulation3.7.4 nominal pressure of less than 1.6Mpa gray cast iron valve body material code, in the type of preparation to be omitted.So its body material is gray cast iron, the sealing surface is copper alloy
- Q:What are the differences between the gate valve and the cut-off valve?
- The operating principle is different. The stop valve is an upward stem type, and the handwheel rotates and rises with the stem. Valve is hand wheel rotation, stem upward movement. Flow is not the same, the gate valve requires full open, the cut-off valve is not the same. The gate valve has no inlet and outlet direction requirements, and the cut-off valve has the required inlet and outletAt the same time, usually with the cut-off valve instead of gate valve, but the valve can also be used instead of cut-off valve. Valve sealing performance better, but the size is generally not large, the size of the gate valve can be done great.The main difference between them lies in:1, different structure, gate valve structure is more complex than the height, larger size, from the appearance point of view than the cut-off gate valve is short and high, especially the gate height space needs a higher open bar, the selection in the installation space under the condition of limited attention to.2, sealing surface, valve in the opening and closing valve and the valve seat surface always contact and friction between the sealing surface, and thus easy to wear, especially in close off the valve when the valve before and after the great pressure, sealing surface wear is more serious. And the valve once the valve is in open condition, it's seat and disc sealing surface between, not in contact,
- Q:What does the gate valve SZ45X-1.0 stand for?
- A modelModel SZ45T-1.0, especially in DN100 ~ DN300 piping, soft sealing gate valve shall be used
- Q:The main question is, what are the functional differences in which case?
- The gate (gate valve) is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, can not be adjusted and the throttle gate valve. The direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, can not be adjusted and the throttle.Gate valve advantages: 1, fluid resistance is small,.2, opening and closing more labor-saving,.3, medium flow unrestricted, not disturbed flow, do not reduce pressure,.4, simple shape, structural length is short, manufacturing process is good, a wide range of applicationsValve shortcomings: 1, between the sealing surface is easy to cause erosion and abrasions, maintenance is more difficult,.2, big size, open need some space, opening and closing time is long,.3, the structure is more complex
- Q:What are the specifications of the gate valves? Does the work pressure need to be marked separately?
- Gate valve code Z, such as GB gate valve Z41H-16. Front is the valve type, and the back 16 represents the pressure of 16 kg, 1.6MPa
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gate valve ； CLASS150--2500 gate valve ;
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 30000 pc/month
OKorder Service Pledge
OKorder Financial Service
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