1″-800LB-Nipples 3 Piece Vacuum Ball Valve

Nominal Size 1 inch (DN 25)
Pressure Class Class 800LB (equivalent to PN 140 bar)
End Connections Integral Nipples (Socket Weld or Butt Weld) – per ASME B16.11 or ASME B16.25
Body Construction 3-Piece (center body with two end caps)
Valve Type Floating ball, full port or reduced port (as specified)
Stem Sealing Live-loaded packing or PTFE/stainless steel bellows (for vacuum service)
Operation Lever handle (standard), gear operator, or actuator (optional)
Vacuum Rating Suitable for high vacuum (1×10⁻⁶ Torr and above)

Liên hệ với chúng tôi

1″-800LB-Nipples 3 Piece Vacuum Ball Valve

Technical Data Sheet

Product: 3-Piece Vacuum Ball Valve with Nipples
Model / Size: 1″ – 800LB – Nipples
Cấu hình: Three-piece body construction with integral nipples (socket weld or butt weld ends) for vacuum service

Product Description

This valve is a three-piece ball valve specifically designed for vacuum service, featuring integral nipples (short pipe extensions) welded or integrally formed on both ends. The three-piece construction allows for easy in-line maintenance without removing the entire valve from the piping system. The valve is rated for Class 800LB pressure, making it suitable for high-pressure vacuum applications, gas handling, and critical process systems where absolute leak integrity is required. It is ideal for vacuum systems, high-purity gas lines, and high-cycle applications where reliable shut-off is essential.

Basic Parameters

Item	Tham số
Kích thước danh nghĩa	1 inch (DN 25)
Pressure Class	Class 800LB (equivalent to PN 140 bar)
End Connections	Integral Nipples (Socket Weld or Butt Weld) – per ASME B16.11 or ASME B16.25
Cấu trúc thân máy	3-Piece (center body with two end caps)
Loại van	Floating ball, full port or reduced port (as specified)
Stem Sealing	Live-loaded packing or PTFE/stainless steel bellows (for vacuum service)
Hoạt động	Lever handle (standard), gear operator, or actuator (optional)
Vacuum Rating	Suitable for high vacuum (1×10⁻⁶ Torr and above)

Tiêu chuẩn thiết kế

Item	Tiêu chuẩn
Design & Manufacture	ASME B16.34 / API 608 (or manufacturer’s standard)
End Connections (Nipples)	ASME B16.11 (Socket Weld) or ASME B16.25 (Butt Weld)
Face-to-Face Dimensions	Manufacturer’s standard (with nipples)
Inspection & Testing	API 598 / ISO 5208; vacuum leak test per ASME PVHO or helium mass spectrometry
Vacuum Testing	Helium leak test with leakage rate ≤ 1×10⁻⁶ Pa·m³/s (or better)
Material Traceability	EN 10204 3.1 (optional)

Bill of Materials (Typical Configuration)

Part Name	Material (Typical Options)	Nhận xét
Body (Center)	A105 / A182 F316 / A182 F304	Forged steel or stainless steel
End Caps (x2)	A105 / A182 F316 / A182 F304	Same material as body
Nipples (x2)	A106 Gr.B / A312 TP316	Integral or welded extensions
Quả bóng	A182 F316 / A182 F304	Chrome plated or electropolished for vacuum service
Seats	PTFE / Reinforced PTFE / PEEK	Low outgassing materials for vacuum
Thân cây	A182 F316 / A182 F304	Precision machined
Stem Packing / Seals	PTFE / Graphite / Bellows (optional)	Low leakage, vacuum-rated
Body Seals (End Caps)	PTFE / Spiral wound gasket	Vacuum-tight sealing
Handle / Operator	Stainless steel / Carbon steel	Locking handle option available

Dimensions & Weight (Reference)

Item	Value
Overall Length (End-to-End)	Approx. 200 ~ 250 mm (including nipples, manufacturer dependent)
Overall Height	Approx. 100 ~ 120 mm (lever type)
Nipple Length (each)	Approx. 50 ~ 75 mm (varies by manufacturer)
Nipple End Type	Socket Weld (per ASME B16.11) or Butt Weld (per ASME B16.25)
Approx. Weight	4.5 ~ 7.5 kg (depending on material and nipple length)

Note: Dimensions and weights are typical values and may vary by manufacturer.

Operating Conditions

Item	Tham số
Suitable Media	Vacuum, gases, high-purity fluids, corrosive media, cryogenic liquids
Vacuum Rating	1×10⁻⁶ Torr (higher vacuum achievable with bellows seal and metal seats)
Temperature Range (PTFE Seats)	-29°C ~ 180°C
Temperature Range (PEEK Seats)	-29°C ~ 250°C
Temperature Range (Graphite Packing)	-29°C ~ 425°C (with metal seats)
Max. Allowable Pressure	Approx. 13.8 MPa (138 bar) at ambient temperature (38°C)
Leakage Rate (Vacuum)	≤ 1×10⁻⁶ Pa·m³/s (helium mass spectrometry)

Testing & Inspection

Test	Requirement
Shell Strength Test	1.5 times rated pressure (hydrostatic); no leakage
High-Pressure Seat Test	1.1 times rated pressure; zero visible leakage (tight shut-off)
Low-Pressure Pneumatic Test	0.6 MPa compressed air; seat and stem leakage within allowable limits
Vacuum Leak Test	Helium mass spectrometry; leakage rate ≤ 1×10⁻⁶ Pa·m³/s (or as specified)
Operational Test	Full cycle test (opening/closing) under pressure and vacuum conditions
Material Verification	Positive Material Identification (PMI) on critical components
Cleanliness	Degreased and cleaned for oxygen or high-purity service (as required)

Features & Benefits

Vacuum Service Optimized: Low outgassing materials, helium leak-tested, and precision-machined components ensure high vacuum integrity.
Three-Piece Construction: Allows for in-line maintenance – end caps can be removed to access ball and seats without disturbing pipe connections.
Integral Nipples: Pre-welded or integrally formed nipples simplify field installation, reducing welding points and potential leak paths.
High Pressure Capability: Class 800 rating suitable for high-pressure gas and liquid systems, including hydraulic and pneumatic applications.
Tight Shut-Off: PTFE or PEEK seats provide zero-leakage sealing in both directions.
Low Operating Torque: Smooth ball and seat surfaces ensure easy operation, even under differential pressure.
Locking Handle (Optional): Prevents unauthorized operation – essential for safety-critical systems.
Fugitive Emission Compliance: Stem sealing can be designed to meet ISO 15848 or TA-Luft standards.

Important Notes

Vacuum Service: For ultra-high vacuum (UHV) applications, specify metal seats and bellows stem seal to achieve leakage rates below 1×10⁻⁹ Pa·m³/s.
Installation: The valve may be installed in any orientation. Ensure proper support for piping to avoid stress on the valve body.
Cleaning: For oxygen service or high-purity vacuum applications, the valve must be specified with degreasing and cleaning per ASTM G93 or CGA G-4.1.
Nipple Ends: Confirm whether nipples are socket weld (SW) or butt weld (BW) to match piping specifications. Socket weld nipples require fillet welding; butt weld nipples require full penetration butt welds.
Maintenance: When replacing seats or seals, use manufacturer-approved kits to maintain vacuum integrity.
Material Compatibility: Verify seat and seal materials are compatible with the process media to prevent swelling, degradation, or outgassing.

If you require additional specifications such as NACE MR0175, oxygen cleaning, high-temperature bellows seal, or actuator mounting, please let me know and I can supplement the data sheet accordingly.

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