The API Soft Sealing Plug Valve is a sleeve-type plug valve with a soft sealing sleeve around the plug, available in Class 150–900 and NPS 1/2–24 for pipeline isolation of water, steam, gas and oil services.
Technical Specifications
|
Parameter |
Specification |
|
Pressure Class |
Class 150, 300, 600, 900 |
|
Nominal Size |
NPS 1/2–24" |
|
Structural Style |
BC |
|
Body Material |
WCB, WCC, CF8, CF8M, CF3, CF3M, UB6, etc. |
|
Plug Material |
WCB, WCC, CF8, CF8M, CF3, CF3M, UB6, etc. |
|
Sleeve Material |
PTFE ≤120°C / RPTFE ≤180°C / PPL ≤260°C |
|
Driving Mode |
Wrench, worm & worm gear, pneumatic, electric actuator |
|
Design Standard |
API 599, API 6D |
|
Face-to-Face Dimension |
ASME B16.10 |
|
Connecting Flange |
ASME B16.5 |
|
Test & Inspection |
API 598, API 6D |
Soft Sealing Construction
Sleeve-Enclosed Plug
The plug rotates within a soft sealing sleeve, which forms the main sealing interface with the valve body during shutoff.
BC Structural Configuration
The BC configuration uses the plug, sleeve and body as the main components of the shut-off assembly.
Non-Lubricated Sealing
The valve relies on the sleeve for sealing without a separate lubricating system.
Pressure & Test Data
|
Pressure Class |
Shell Test |
Sealing Test |
|
Class 150 |
3.0 MPa |
2.2 MPa |
|
Class 300 |
7.5 MPa |
5.5 MPa |
|
Class 600 |
15.0 MPa |
11.0 MPa |
|
Class 900 |
22.5 MPa |
16.5 MPa |
Testing is carried out according to the specified pressure class and applicable API 598 and API 6D requirements.
Material & Service Selection
Body and Plug Materials
WCB, WCC, CF8, CF8M, CF3, CF3M and UB6 are available for body and plug construction. Material selection depends on the valve configuration and service conditions.
Sleeve Material
PTFE is specified for temperatures up to 120°C, RPTFE up to 180°C and PPL up to 260°C. The sleeve grade should be selected according to the actual operating temperature of the medium.
Service Matching
Body, plug and sleeve materials should be matched to the service medium, operating temperature and pressure conditions.
Quality & Inspection
Material Verification
Body, plug and other specified components are checked against the ordered material requirements before assembly and final release.
Dimensional Inspection
Key valve dimensions are inspected against the specified configuration, including face-to-face dimensions and flange requirements.
Pressure and Sealing Tests
Each valve is subjected to shell and sealing tests according to the applicable pressure class and specified inspection standard.
Operation Inspection
The completed valve is operated through the required positions to verify plug movement and operating mechanism function.
Final Inspection
Final inspection covers valve configuration, materials, dimensions, operation and required test results before shipment.
FAQ
Q: What information is needed for a quotation?
A: Please provide the required NPS, pressure class, service medium, operating temperature, end connection, actuation and quantity. Project-specific inspection or documentation requirements should also be included.
Q: What is the typical MOQ?
A: MOQ depends on the valve configuration, materials and order scope. The applicable quantity is confirmed during quotation.
Q: What is the typical lead time?
A: Standard configurations typically require around 4–8 weeks after order confirmation. Special materials, non-standard configurations or larger quantities may require additional production time.
Q: Can the valve configuration be customized?
A: Yes. Body and plug materials, sleeve materials, actuation and other project-specific requirements can be reviewed during quotation and confirmed before production.
Q: Can inspection and documentation requirements be specified in the order?
A: Yes. Required inspection items and documentation can be discussed during quotation and included in the purchase specification.
Q: Is technical support available for valve selection?
A: Yes. Technical support is available for reviewing valve size, pressure class, materials, sleeve selection, actuation and service conditions before order confirmation.
Q: What after-sales support is available?
A: Technical assistance, installation guidance, operation information and maintenance recommendations can be provided after delivery.
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