4" CAST STEEL GATE VALVE RF BB CLASS150 TR8
Gate valve is characterized by a sliding wedge which is moved by actuator perpendicular to the flow direction. There are a variety of valve sizes and types. The valve is used primarily as a stop valve to open or close fully. Normally it works for slurries, viscous fluid, etc.,but not for throttling. The gate valve usually has a minimum pressure drop in full open and a tight seal in full close, and therefore there is little possibility that contaminants may enter the valve.
In the refineries, power plants, utilities and petrochemical/chemical process industries, PK cast steel valve have been regarded as of great importance about their excellent performance and reliability.
By discriminatory blending of carefully selected materials combined with sound design and precision
machining/assembly under strict quality controls, PK steel valve have gained general and wide acceptance. The products are manufactured in accordance with ASTM, ANSI, or other international standards.
Service Features:
- Several trim combinations available for various services.
- Straight-through port design offering a good flow with minimum frictional loss and turbulence.
- Cast steel Valve suitable for works demanding strength, shock resistance, elongation and heat resistance.
- Bypass mounting to equalize pressures.
- Normal yoke bushing furnished with ductility resistant to high melting point of above 2200°F.
- Designed for maximum flow with minimum pressure drop if possible.
- Precision-ground seating surfaces and revolving disc providing a long life.
End Connections:
-In the standard production of valve, the flange ends(RF.FF) and the face to face dimensinos conform to ANSI B16.5 and ASME B16.10, respectively, and they have a raised face serrated finish type or other finish type as requested.
-For butt-welded ends (B.W.), of which the end to end dimension conforms to ASME B16.10, customer must specify the schedule type required, pipe class, or bore diameter.
-Ring type joint flanged ends (R.T.J) conform to ASME B16.5 and the end to end dimension follows ASME B16.10. The other special end connections may be supplied as required by customer.
In stock
Only 2 left
SKU
310-PKWCBBRF124
Gate valve is characterized by a sliding wedge which is moved by actuator perpendicular to the flow direction. There are a variety of valve sizes and types. The valve is used primarily as a stop valve to open or close fully. Normally it works for slurries, viscous fluid, etc.,but not for throttling. The gate valve usually has a minimum pressure drop in full open and a tight seal in full close, and therefore there is little possibility that contaminants may enter the valve.
In the refineries, power plants, utilities and petrochemical/chemical process industries, PK cast steel valve have been regarded as of great importance about their excellent performance and reliability.
By discriminatory blending of carefully selected materials combined with sound design and precision
machining/assembly under strict quality controls, PK steel valve have gained general and wide acceptance. The products are manufactured in accordance with ASTM, ANSI, or other international standards.
PRODUCTION MATERIALS:
Carbon Steel : ASTM A216-WCB or Equivalent
Alloy Steel : ASTM A217-WC6, WC9, C5, C12, C12A or Equivalent
Stainless Steel : ASTM A351-CF8, CF8M, CF3, CF3M, CN7M, or Equivalent
Duplex Stainless Steel : ASTM A995-1A, 2A, 4A, 5A or Equivalent
Special Alloy Steel : Inconel 625, Incoloy 825, Hastelloy C, Monel, AL-BRONZE
ASME SA designation material(e.g ASME SA217-WC6)
BODY AND BONNET
The body and bonnet is designed to achieve most uniform distribution of stress on all sides and minimum turbulence and resistance to flow.The bonnet on valve is equipped with back seat ring up to 12" for Class 150 & 300 and up to 10" for Class 600 or higher. The yoke is integrated with bonnet.
BODY-BONNET JOINT
Body-bonnet joint of gate valve is machined as follows:
Class 150 ................................... Plain faced
Class 300 and higher class ........ Male and female
WEDGE
The valve is normally supplied with a one-piece flexible wedge of which the cross section is a tapered H shape. All wedges are fully guided. The flexible wedge is cast or machined with circumferential grooves to allow the seating faces to move independently and adjust the movement of body seat. It is used where the line load or thermal expansion of system may distort the seating face of valve, and especially uesful to prevent sticking that may happen in case the valve is closed at a hot temperature and opened at a cold temperature. Ideally the wedge is suitable for steam and other high temperature service.
BOLTS AND NUTS
Bolts and nuts are made from four different types of steel materials in conformity with the ASTM specification:
1) A307 Grade B : It has a minimum tensile strength of 55,000 pounds per square inch (3870kg/㎟).
The nuts normally used with machine bolts are a hot pressed steel conforming to ASTM specification A307, which is
usually applied to hinge bolts and nuts.
2) A193 Grade B7/B16 : It usually retains the strength well at an elevated temperature and offers higher resistance to
creep than any other high grade steel used as bolting materials. This steel is regularly used in bonnet bolts.
3) A194 Grade 2H/4 : The nuts of this grade shall be re-heated above the critical range of steel, quenched in a suitable
medium, and then tempered at a temperature not less than 850°F(455°C). This steel is regularly used in bonnet nuts.
4) Carbon steel : It is used in hand wheel nuts, set screws, or nipples.
YOKE SLEEVE
The yoke sleeve is designed to able to be disassembled without discounting bonnet and stem, and provided with ball bearing of 14" or over for Class 150 ~ 300 valve, 6"or over for Class 600, and 2" or over for Class 900 ~ 1500.
END CONNECTIONS
In our standard production of valve, the flange ends(RF.FF) and the face to face dimensinos conform to ANSI B16.5 and
ASME B16.10, respectively, and they have a raised face serrated finish type or other finish type as requested.
For butt-welded ends (B.W.), of which the end to end dimension conforms to ASME B16.10, customer must specify the
schedule type required, pipe class, or bore diameter.
Ring type joint flanged ends (R.T.J) conform to ASME B16.5 and the end to end dimension follows ASME B16.10. The other
special end connections may be supplied as required by customer.
GASKET MATERIALS
Packing material supplied in standard valve is non-asbestos graphite, with braided graphite rings and die-formed rings
configured to provide reliable and long-lasting performance. Braided rings are coated with zinc dust to inhibit corrosion.
Dieformed rings are 98% carbon(minimum)and have maximum 50PPM chloride 550PPM sulfur content.
For standard valve, gasket materials are as follows;
Class 150 - graphite sheet type with 304 stainless steel tanged insert. (1.6mm minimum overall thickness)
Class 300 - spiral wound 304 stainless steel and graphite.
Class 600 - same as class 300 or 900
Class 900 and 1500 - Ring type joint
DIMENSION AND WEIGHT
| SKU | 310-PKWCBBRF124 |
|---|---|
| Manufacturer | PK VALVE |
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