1″-2500LB-BW Double Block Gate Valve

Technical Data Sheet

Product: Double Block Gate Valve
Model / Size: 1″ – 2500LB – BW
Configuration: Two high-pressure forged steel gate valves welded into a single integrated body assembly

1. Product Description

This valve consists of two forged steel gate valves welded together to form a compact, single-unit double block isolation assembly. The double block configuration provides two independent sealing barriers, ensuring positive isolation even in the event of a single seal failure. This assembly is ideal for critical applications such as high-pressure steam, hydrogen, hydrocarbon, and chemical services where absolute shut-off, safety, and system integrity are paramount. Each valve operates independently, allowing for cavity pressure monitoring, testing, or venting between the two blocks. All connections are butt weld (BW) ends, ensuring leak-free, permanent piping integration.

2. Basic Parameters

3. Design Standards

4. Bill of Materials (Typical Configuration)

5. Dimensions & Weight (Reference)

Note: Dimensions and weights are typical values for welded double block gate valve assemblies and may vary by manufacturer.

6. Operating Conditions

7. Testing & Inspection

8. Features & Benefits

1. Double Block Isolation: Two independent gate valves in a single welded assembly provide redundant shut-off capability, ensuring absolute isolation for critical systems.
2. Compact, Leak-Free Design: Welded integration eliminates external flange connections between valves, reducing potential leak paths and installation space.
3. High-Pressure Capability: Class 2500 rating with forged steel construction ensures reliability in ultra-high-pressure applications.
4. Permanent Butt Weld Ends: BW connections provide a leak-free, permanent installation ideal for critical and hazardous services.
5. Cavity Monitoring Capability: The space between the two blocks allows for pressure monitoring, venting, or testing without disturbing system operation.
6. Fugitive Emission Compliance: Stem packing systems can be designed to meet ISO 15848 or TA-Luft low-emission requirements.
7. Flexible Wedge Option: For high-temperature applications, flexible wedge design accommodates thermal expansion and prevents binding.

9. Important Notes

• Operation Sequence: When used as a double block assembly, typically the upstream valve is opened first and closed last to protect the downstream valve from full system pressure and flow-induced wear.
• Cavity Pressure Relief: A bleed or vent port (optional) should be considered to relieve trapped pressure between the two blocks before maintenance or disassembly downstream.
• Butt Weld Installation: Welding must be performed per approved Welding Procedure Specification (WPS) with appropriate post-weld heat treatment (PWHT) when required by material and wall thickness.
• Flow Direction: Gate valves are bidirectional; no specific flow orientation is required unless otherwise specified by manufacturer.
• Thermal Expansion: Allow for thermal expansion of piping system; installation should consider proper support and anchoring.
• NDE Requirements: Body-to-body weld requires 100% NDE; ensure this is performed and documented as part of quality control.

If you require additional specifications such as NACE MR0175 for sour service, gear operators for high-torque applications, or fugitive emission testing documentation, please let me know and I can supplement the data sheet accordingly.

GUATANTEE:

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.