Flange Double-Chamber Exhaust Valve QB2
Flange Double-Chamber Exhaust Valve Purpose
Flange double-chamber exhaust valve is suitable for the working medium of water on the pipeline, in order to improve the efficiency of water conveying equipment and protect the pipeline from deformation and rupture, is the necessary equipment of the pipeline. it is used for the most store on the pipeline or the place with closed air and the outlet of the pump to remove the gas in the pipeline to dredge the pipeline and achieve normal work. if the exhaust valve is not installed, the pipeline will be blocked at any time, so that the outlet capacity of the pipeline can not meet the design requirements, Secondly, when the pipeline is running, the pump stop and power failure phenomenon will produce negative pressure causing pipeline vibration or rupture, and the rapid exhaust valve can quickly draw air into the pipe to prevent pipeline vibration or rupture.
Flange Double-Chamber Exhaust Valve Definition and Components
What is a Flange Double-Chamber Exhaust Valve QB2 and what are its main parts?
A Flange Double-Chamber Exhaust Valve QB2 is an automatic air release valve used in pipeline systems, featuring a dual-chamber design to efficiently expel air and prevent airlocks or pressure buildup. Its main parts include:
- Valve Body: The outer casing, typically made of cast iron or stainless steel.
- Valve Cover: Provides access for maintenance.
- Float Ball: Senses air volume and controls exhaust opening/closing.
- Lever Mechanism: Connects the float ball to the exhaust port.
- Exhaust Port: Channel for air discharge.
- Flange Connection: Standard interface for pipeline attachment.
Role, Characteristics, and Application Scenarios of Flange Double-Chamber Exhaust Valve in Pipelines
Functions, operational features, and usage scenarios
- Functions: Automatically removes accumulated air from pipelines, ensuring continuous fluid flow and preventing cavitation, pressure fluctuations, or pipeline damage.
- Operational Features: Based on the float principle. When air enters the chamber, the float ball descends, opening the exhaust port via the lever; after air discharge, the float rises to close the valve and prevent fluid leakage.
- Usage Scenarios: Suitable for water supply systems, wastewater treatment plants, industrial pipelines, HVAC systems, and pumping stations where efficient air release is required.
Flange Double-Chamber Exhaust Valve Standards: Materials, Design, and Connections
Air Valve for Water Material standards, design standards, and connection standards
- Material Standards: Valve body commonly uses cast iron (e.g., ASTM A126) or stainless steel (e.g., ASTM A351); seals are made of EPDM or similar materials.
- Design Standards: Complies with API 602, ANSI/ASME B16.34, etc., to ensure structural strength and performance.
- Connection Standards: Flange connections adhere to standards like ANSI B16.5 Class 150 or DIN EN 1092-1 PN16 for compatibility.
How to Select Flange Double-Chamber Exhaust Valve
How to purchase
- Specify Requirements: Select valve model based on pipeline pressure, size, and media type.
- Choose Suppliers: Purchase from certified manufacturers or distributors, verifying quality certifications like ISO 9001.
- Compare Quotes: Obtain multiple quotes, evaluating price, delivery time, and after-sales service.
- Sign Contracts: Clarify technical parameters, warranty terms, and shipping details.
Pre-Shipment Inspection for Export Flange Double-Chamber Exhaust Valve and Key Considerations
Water Valves Inspection before export shipment and precautions
Inspection Content:
- Visual Check: Ensure no damage or corrosion.
- Functional Test: Conduct pressure and sealing tests.
- Packaging Check: Verify moisture-proof and shock-resistant packaging.
- Document Review: Include certificates, packing lists, and manuals.
Precautions:
- Clean valves and apply anti-rust oil.
- Ensure clear packaging labels with model, flow direction, and weight.
- Comply with regulations of both exporting and destination countries.
Flange Double-Chamber Exhaust Valve Main dimensions(mm)
| DN | L | D | D2 | D1 | Z-фd |
| 50 | 255 | 160 | 99 | 125 | 4-фd |
| 80 | 320 | 195 | 135 | 160 | 8-18 |
| 100 | 330 | 215 | 158 | 180 | 8-18 |
| 150 | 410 | 280 | 212 | 240 | 8-22 |
| 200 | 440 | 335 | 265 | 295 | 8-22 |
Note:1. Other specifications and flange standards are available upon request.
- Design and specifications are subject to change without prior notice.