ASTM A216 WCB Inverted Plug Valve, BS 5353, 3 IN, Lubricated

Product Name: ASTM A216 WCB Inverted Plug Valve
Type: Pressure Balanced, Lubricated, Inverted, Plug Valve
Design Standard: API 6D, BS 5353
Body Material: ASTM A216 WCB, Carbon Steel
Size: 3 Inch, DN80, 80 mm
Pressure: Class 300 LB, PN50
End Connection: RF Flanged
Operation: Lever

Pressure-balanced inverted conical plug valves are ideal for any operating condition, including most severe operating conditions. Can be used for fast action, trouble-free and efficient sealing requirements, the design is very compact, the required installation space is small, can be installed in any location. Basic operation of the valve is quite simple, when the cock rotate 90 , the location of the valve from on to off, or vice versa.

Technical Specification

» Structure: Inverted Pressure Balance Plug Valve

» Nominal Diameter: NPS 2 inch to 16 inches (DN50-DN400)

» Design Pressure: Class 150 to 2500 LB (PN20-PN420)

» Material: ASTM A216 WCB, WCC, A217 WC6, WC9, C5, A352 LCB, LCC, A351 CF8, CF8M, CF3M, CF8C, CN3MN, CN7M, A890 4A , 5A , 6A , B148 C95800, C95500

» Design Standard: API 6D, API 599

» Face to Face: ASME B16.10

» Connection End: RF, RTJ, BW

» Test Standard: API 598, ISO 5208

» Design Temperature: -29°C to + 80°C

» Applicable Medium: Water, steam, oil, gas, etc.

» Operation: Lever, worm gear, electric, pneumatic

» Option Bore Pattern: Venturi, Regular, Short, Standard

» Metal to Metal Seated Design

» Injection Grease Sealed Design (for stem and seats)

» Fire Safe

Product Features

The Body: Adopt flip - type structure, integral casting, high strength, good rigidity, uniform force, valve center of gravity and pipeline center basically coincide, good operation stability. The valve body seal cone is processed by high-speed fine grinding, and the surface roughness precision after grinding is higher than Ra0.8.

Cock: Using inversion plug, the overall forging, precision machining and grinding surface roughness can reach Ra0. 4. After the surfaces of the cock, plating nickel phosphorus alloy nitride or spraying hard alloy surface treatment to improve the surface hardness, such as supersonic spraying hard alloy surface hardness can reach above 65 HRC, nickel-plated phosphor and after heat treatment, the surface hardness of 58  60 HRC. Under the oil film lubrication with super wear resistance. The upper part of the tap cone is provided with a check valve to compensate the oil pressure in the upper part of the valve chamber. The lower part of the tap oil balance hole, can be introduced into the media pressure at the bottom of the cock, so that the plug pressure valve body plays a sealing role.

Sealing pair: The metal sealing structure is used for grease sealing. Due to the filling effect of the sealing grease, the solid particles in the medium will not enter the sealing surface, which has a very good protective effect on the sealing surface. Because of grease lubrication, so that the valve operating torque is small, easy to operate. Special asymmetric oil groove design, automatic filling of sealing grease without leakage when rotating the cock, completely ensuring the integrity of oil film and reliable sealing. The asymmetrical tank design results in very low fuel loss and prolongs the filling time and service life of the grease. Cone seal, sealing contact area is large. Oil film lubrication, long service life.

Stem and stem seal: Stem strength and sealing performance is one of the main factors affecting stem operation and overall valve performance. Sten force is mainly from the friction at the packing, operating torque and medium thrust. The connecting mode of valve stem and cock is slip-ring type, which can reduce the concentricity error between the center of valve stem and the cone surface of cock, and improve the stress condition and operation performance of valve stem. The stem is designed to fly out and the packing seal can be replaced online. Stem seal with fireproof packing, 0 - ring seal, grease triple seal design. After machining, the surface roughness of the stem can reach Ra0.4, which fully meets the sealing requirements of the stem and can work reliably for a long time without fastening and maintenance. Valve stem integral forging, and add conditioning treatment, high strength and good toughness. The surface of valve stem is nitride or nickel-phosphor plated with high surface hardness and friction resistance.

Bonnet and bottom construction: The bottom bonnet is the bearing part at the bottom of the valve, as well as the fixed and installed support for the bottom sealing gasket and bottom regulating rod, requiring high stiffness and strength. The bottom cover is sealed with a fully isolated integral gasket to ensure an absolutely reliable seal when the cover bolts are tightened. The regulating rod installed at the bottom of the bonnet is of built-in construction, and the gland is screwed with zero leakage after adjustment. The bottom adjusting rod supports the cock and leads to the static electricity generated by the cock for various reasons