What Are Bellows Valves?
Bellows valves are integral components in systems that handle gases and other fluids. A bellows is essentially a flexible, accordion-like component that expands and contracts to allow movement while maintaining a hermetic seal. The bellows is typically made from a durable, corrosion-resistant material like stainless steel, and its design enables it to withstand high pressures and temperatures.
When operated, bellows valves expand or contract to enable the valve to open or close. The bellows design allows for high-flow capacity while maintaining an optimized form factor. Bellows valves effectively control the flow of gases or other fluids within the system. They can be opened or closed to start or stop the flow, or partially opened to regulate the flow rate. The hermetic seal created by the bellows valves ensures that the fluid path is isolated from the atmosphere, preventing contamination and ensuring the purity of the gases.
700 Series
The 700 Series high-flow bulk facility valve is intended for use in ultra-high purity gas distribution systems. It features a unique lightweight design that reduces installation costs and can accommodate connection sizes up 6-inches. With its excellent leak integrity and gas containment capabilities, the 700 Series is ideal for applications where process cleanliness is critical.
Features
700 Series UHP Stainless Steel Bulk Facility Valve High Flow Bellows Features:
- Inconel 625 bellows for increased pressure, ultra high purity and maximum cycle life in a small envelope
- Lower weight reduces gas distribution system installation costs
- Optimized stroke for higher Cv
- Optimum purge port locations at seals
- Maximum operating pressure 375 psig (250 psig 1” size)
- Sizes up to 6” available
- AOP available in 1”, 1-1/2” and 2” sizes
Specifications
700 Series UHP Stainless Steel Bulk Facility Valve High Flow Bellows Specifications:
| Materials of Construction | |
| Wetted | |
| Body | 316L Stainless Steel |
| Tube Ends | 316L Stainless Steel |
| Seat Holder | |
| 0706 | 316 Stainless Steel |
| 0708, 0712, 0716, 0724 | 316L Stainless Steel |
| Bellows Adapter | 316L Stainless Steel |
| Bellows | |
| 0706 | 316L Stainless Steel |
| 0708, 0712, 0716, 0724 | Inconel? 625 |
| Seat | PCTFE |
| Bonnet Gasket | Nickel |
| Non-Wetted | |
| Handle | Aluminum |
| Stem | 316L or 17-4 Stainless Steel |
| Driver | Bronze |
| Guide | Brass |
| Bonnet | Aluminum |
| Surface Finish | 10 micro inch Ra |
| Functional Performance | |
| Design Pressure | |
| Proof | |
| 0706 | 375 psig (25.86 barg) |
| 0708, 0712, 0716, 0724 | 562.5 psig (38.78 barg) |
| Burst | |
| 0706 | 750 psig (51.71 barg) |
| 0708, 0712, 0716, 0724 | 1,125 psig (77.57 barg) |
| Leak Rate | Inboard Test Method |
| Internal | |
| 1 X 10-10 scc/sec He |
| 1 X 10-9 scc/sec He |
| Operating Conditions | |
| Maximum Pressure | |
| 0706 | 250 psig (17.24 barg) |
| Maximum Temperature | 140°F (60°C) |
| 0708, 0712, 0716, 0724 | 375 psig (25.86 barg) |
| Minimum Pressure | Vacuum |
| AOP Actuation Pressure | 100 psig (6.9 barg, nominal) |
| AOP Air Inlet | 1/8 - 27 NPT |
| Temperature | |
| Maximum | 140°F (60°C) |
| Minimum | -40°F (-40°C) |
Applications
700 Series UHP Stainless Steel Bulk Facility Valve High Flow Bellows Specifications:
- Bulk Gas Delivery System
- Facility Gas Main
- Facility Gas Lateral
Downloads
Download 700 Series UHP Stainless Steel Bulk Facility Valve High Flow Bellows Datasheet
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