GENERAL CHARACTERISTICS
 
The AIR RELIEF VALVE – TRIPLE FUNCTION FOR SEWAGE WATER is specifically engineered to ensure safe and efficient air management in wastewater and sewage systems. Its advanced yet simple internal mechanism incorporates a reinforced float designed to withstand sudden water hammer and ensure rapid closure, enhancing operational safety and durability.
The valve operates with a high-performance aerokinetic mechanism, preventing blow shut even at high air velocities, up to sonic speed. Its specially designed enlarged body reduces sewage flow velocity, allowing effective air discharge while keeping wastewater contained below the sealing system. During operation, dirty or corrosive liquids remain safely inside the body, protecting both personnel and the surrounding environment.
 
An internal body guide and rounded upper wall maintain controlled float movement along its axis, stabilizing operation and managing turbulence within the chamber. The design enables significantly higher air flow capacity through the nozzle, even when handling high-viscosity sewage media. An optional external protective screen can be supplied to prevent the ingress of insects or birds.
The valve body is fully fusion-bonded epoxy coated internally and externally, ensuring long-term corrosion resistance and extended service life in aggressive sewage environments.
Manufactured in accordance with BS EN 1074-4 and AWWA C512, the flange drilling and dimensions comply with BS EN 1092 and ANSI standards.
 
Functional Performance
The triple-function design provides:
• Large air release during pipeline filling
• Continuous small air venting under pressurized conditions
• Large air intake during pipeline draining
Technical Information
Size range: DN50–DN200
Pressure ratings: 1.0 MPa and 1.6 MPa (flanged)
Working temperature: -10°C to +80°C
Suitable medium: Sewage water
 
For higher pressure class PN25 or installations subject to significant water hammer, consultation with the factory is recommended, including the option of an anti-shock device.
A robust, corrosion-resistant, and hydraulically efficient triple-function air valve—designed to safeguard sewage pipelines and ensure long-term operational reliability.

Ref. 175B / PN 10-16 AIR RELIEF TRIPLE FUNCTION SEWAGE WATER

SKU: Ref. 175B / PN 10-16

All components can be replaced with equivalent or higher-grade materials.
Reinforced float and simple mechanism ensure durability and fast closure under water hammer conditions.
Aerokinetic system prevents blow shut at high or near-sonic air velocities.
Enlarged body design reduces sewage flow speed, allowing efficient air release while retaining wastewater inside.
Internal guides stabilize float movement and control turbulence.
High air discharge capacity, even with high-viscosity media.
Optional external screen for protection against insects or debris.
Fully fusion-bonded epoxy coating inside and outside for long-term corrosion resistance.
Manufactured according to BS EN 1074-4 and AWWA C512, with flanges compliant with BS EN 1092 and ANSI standards.
(a) Any descriptive information or samples supplied by DAVINCI VALVES LTD, or on its behalf, are for general guidance only and do not form part of any contract between DAVINCI VALVES LTD and the customer and the customer admits that it was not induced to enter into the contract by any representation contained in such information or sample. (b) DAVINCI VALVES LTD may at the request of the customer without being under any obligation to do so, furnish technical advice concerning the use of the products and such assistance will be given to the best of DAVINCI VALVE’s ability but this shall be on the express understanding that any such advice or assistance is given and accepted at the customer’s risk and DAVINCI VALVES shall not be liable for any loss, damage or claims arising there-from. (c) No liability will be accepted for work carried out or material supplied to the customer’s own drawings, design or specifications. (d) The submission of a quotation or acceptance of any order by DAVINCI VALVES in no way implies any responsibility on its part for any by-law, planning or other approval which may be required by the customer.

Ref. 175B / PN 10-16 AIR RELIEF TRIPLE FUNCTION SEWAGE WATER

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