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Resilient Wedge Gate Valve Flexible Wedge Bolt Bonnet Reliable Sealing

Resilient Wedge Gate Valve Flexible Wedge Bolt Bonnet Reliable Sealing

Brand Name: Kelite Valve
Certification: API, ISO, CE, GOST, TS, BS1873, BS5351, API 6D,600,602,609, ASME B16.34, API 6FA, API607 etc
Model Number: 2"-56", CL150-2500
Minimum Order Quantity: 1PCS
Delivery Time: 30-60days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Kelite Group Co., Ltd
Verified Supplier
Shanghai Shanghai China
Business type: Manufacturer
Room 502, Tower B, No.2888 South Qi Lianshan Road, Putuo District, Shanghai, China
Supplier`s last login times: within 28 hours

API 600 cast gate valve, flexible wedge, OS&Y, bolt bonnet


APPLICATION & FUNCTION
Gate valves are primarily used for stop valves fully opened or fully closed. They are not normally considered for throttling purposes, but more for slurries, viscous fluids, etc. Gate valves are characterized by a traveling wedge, which is moved with the operation of the stem nut. The wedge travels perpendicular to the direction of the flow. Gate valves usually have a minimum pressure drop when fully open, provide tight shut-off when fully closed, and remain relatively free of contamination buildup.


BODY & BONNET
The design of the body and bonnet is calculated to achieve the most regular distribution of stress in all directions, as well as the minimum turbulence and resistance to flow. Valve bonnets are equipped with a backseat bushing. The yoke is integrally cast on Pressure Classes 150 and 300 up to 12” and up to 10” on Class 600 and higher ratings.


GATE
All gates are fully guided to the seats. As standard our valves are supplied with a solid flexible gate that has a tapered H cross-section. The flexible wedge is cast or machined with a circumferential groove to allow the seating surfaces to move independently and adjust to movement of the body seats. This design is beneficial where line loads or thermal expansion of the system is likely to distort the seat face in the valve. This design of gate is ideally suited for steam or other high temperature services and is especially useful to prevent sticking where valves are closed when hot and opened when cold.


SEAT RING
Seat rings are designed to greatly reduce and/or prevent any turbulence and avoid damages due to the corrosion. The seat rings are forged or rolled in one piece, and then seal welded and overlaid, if required. After welding and all required heat treating, the seat ring faces are machined, thoroughly cleaned and inspected before leaving for assembly.


STEM
The stem connection to the gate is a T-head design which is integral (without welding) with the stem. The accuracy in the dimensions and finishes assure a long life with a perfect tightness in the packing area, resulting in lower fugitive emissions. The stem-to-gate connection is designed to
prevent the turning or the disengagement of stem from the wedge while the valve is in service. Through calculations and extreme testing, the strength of the stem-to-gate connection has proven to exceed the strength of the stem at the root of its operating thread.


STEM PACKING
The stem packing is designed and arranged to ensure a maximum seal along the stem during operation or while at position,
thus allowing for a greater reduction in fugitive emissions. Our packings are NONASBESTOS types.
Kelite Valve can supply any style of packing required by our customer.


STUFFING BOX
The depth of the stuffing box allows for a sufficient amount of packing, which makes the stem seal. Our standard packing arrangement and stuffing box design meets <100 ppm fugitive emission requirements. If specified in the purchase order, lantern rings and/or grease injectors can be furnished.


PACKING GLAND
The packing gland design is a two-piece self-aligning type. The packing gland has a spherical head that rides within the spherical joint of the gland flange. The packing gland has a shoulder, which restricts the complete entry into the stuffing box bore. This particular design assures a straight compression of the packing as the gland eyebolts are being equally adjusted, without injuring the stem.


STEM NUT
The stem nut arrangement and design allows for the removal of the handwheel without allowing the stem and gate to drop into the closed position if the handwheel is removed while the valve is in the open position. Ball bearings are provided in the stem nut arrangement of Class 150 valves from NPS 14”, on Class 300 valves from NPS 12:, on Class 600 valves from NPS 6”, and on Classes 900-1500 valves from NPS 2”.


HANDWHEELS
Handwheels are designed for easy operation and a comfortable grip. Our valves are also available with gearing, motor actuators or cylinder actuators for the more demanding services.


BOLTS AND NUTS
For normal service conditions, ASTM A194 Class 2H and ASTM A193 Grade B7 nuts and stud bolts are furnished. If specified for high temperature service conditions, ASTM A194 Class 4 and ASTM A193 Grade B16 nuts and stud bolts are furnished. Standard bolting furnished for our stainless steel valves consists of ASTM A194 Class 8 and ASTM A193 Grade B8 nuts and stud bolts.
Kelite Valve can supply any bolting as required by the customer.


END CONNECTIONS
Our standard production covers valves with:

  • Flange ends with Raised Face (RF), Flat Face (FF) or Ring Type Joint (RTJ) that conform to B16.5.
  • Butt-welding ends (BW) that conform to B16.25.
  • All face-to-face/end-to-end dimensions conform to B16.10.
  • Other special end connections are supplied according to customer’s requirements.

ACCESSORIES
Accessories such as gear operators, actuators, bypasses, locking devices, chainwheels, extended stems and bonnets for cryogenic service and many others are available to meet the customers requirements.


TECHNICAL PARAMETERS AND CHARACTERISTICS:

Product descriptionWedge resilient gate valve
ModelGate valve
Nominal diameterNPS 2”~56”
Operating temperature-196℃~593℃(the range of service temperature may vary for different materials)
Operating pressure150-2500 CLASS
MaterialA216 WCB,WCC; A217 WC6,WC9,C5,C12,C12A,CA15; A351 CF8,CF8M,CF3,CF3M,CF8C,CN3MN,CK3MCUN,CN7M; A352 LCB,LCC; A494 CW-6MC,CU5MCuC,M35-1; A890 4A(CD3MN),5A(CE3MN),6A(CD3MWCuN); ASME B 148 C95800,C95500, etc.
Design standardAPI 600,ASME B16.34,GB 12234,GB 12224
Structural lengthASME B16.10
Connecting endASME B16.5,ASME B16.25,GB 9113,GB 12224
Test standardAPI 598,ISO 5208,JB/T9092,GB/T13927
Operation methodnon-elevating hand wheel, bevel gear, motor drive unit, pneumatic drive unit
Application fieldsFor application in fields such as electric power industry, petroleum refining, petrochemical engineering, offshore oil, tap water engineering in urban construction, chemical engineering, etc.
Other remarks 1The sealing faces of valve seat and valve clack are build-up welded with hard alloy to improve the erosion resistance and extend the service life of valve.
Other remarks 2SS+ graphite or metallic seal or pressure self-sealing is adopted between valve body and bonnet for reliable sealing
Other remarks 3Rising stem structure, making the valve switch position be clear at a glance
Other remarks 4The valve stem thread will not come into contact with the medium, so the corrosion of medium to the thread is reduced.
Other remarks 5Small switching moment, reliable sealing
Other remarks 6The gate valve is of wedge and resilient type that can compensate the slight deformation, so the sealing performance is good.
Other remarks 7Small flow resistance, high flow capacity and good flow characteristics
Other remarks 8For small gate valves, the interchangeability can be ensured with process tooling.
Other remarks 9Through improving the structural design and selecting reasonable packing structure and qualified packing supplier, the valves can meet the Class A sealing test requirements of ISO 15848 FE.



Product Tags:

cast steel gate valve

      

stainless steel knife gate valve

      

Resilient Wedge Gate Valve Flexible Wedge Bolt Bonnet Reliable Sealing Images

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