Ref. 181A / PN 10-16 PRESSURE REDUCING VALVE

GENERAL CHARACTERISTICS

DAVINCI PRESSURE REDUCING VALVES are designed to automatically reduce high or fluctuating inlet pressure to a stable, predetermined downstream pressure. Their robust construction and accurate regulating performance make them suitable for hydraulic installations requiring reliable pressure control, operational safety, and continuous service under changing flow conditions.

Available in sizes from DN50 to DN800 mm, the valves feature a high-strength ductile iron body for enhanced mechanical resistance and durability. All iron surfaces are protected with a fusion-bonded epoxy coating, providing effective resistance against corrosion and extending the service life of the valve in demanding environments.

The internal assembly incorporates a stem guided at both the cover and seat-ring areas, together with a nylon-reinforced diaphragm that ensures smooth operation, accurate response, and long-term reliability. A corrosion-resistant stainless steel seat and disc-retaining ring provide durable sealing performance, while the valve’s drip-tight shut-off helps prevent leakage when the system is closed. Its globe-pattern body delivers excellent throttling and modulation characteristics across a wide range of operating conditions.

The valve has been developed to simplify inspection and servicing. Internal components can be accessed without removing the valve body from the main pipeline, helping to reduce maintenance time, system interruptions, and operating costs.

DAVINCI PRESSURE REDUCING VALVES are commonly installed in municipal drinking-water networks, irrigation systems, industrial processing plants, pumping stations, HVAC and cooling systems, mining operations, high-rise building services, and fire protection networks. They are particularly suitable for installations where downstream equipment and pipelines must be protected from excessive or unstable pressure.

A wide selection of pilots, filters, pressure gauges, isolation devices, and additional accessories is available to adapt the valve to specific system requirements. Optional V-Port trim can be supplied for improved control at low flow rates, while a double-chamber configuration is available for specialized operating conditions.

Please consult the factory for application assessment and configuration recommendations.

Ref. 181A / PN 10-16 PRESSURE REDUCING VALVE

SKU: Ref. 181A / PN 10-16

Size Range: DN50 up to DN800mm
Top and seat ring guided stem and diaphragm assembly for long life and reliability.
All iron components are fusion epoxy bonded for corrosion resistance.
Easy maintence without removal from the main line.
Nylon reinforced diaphragm for long term service.
Drip tight shut off.
Globe design for superior control characteristics.
Ductile iron bodies for higher strength and durability.
Corrosion resistant stainless steel seat and disc retainer ring.
Various pilots and accessories available for configuration into many applications.
Special V-Port and double chamber are options, please consult factory.
Manufacture according to: EN 1074-5
Design and testing standards: BS EN 1074-5, ISO 5208, BS EN 12266-1 and BS EN 558-1
Flange connections: EN 1092-1 / EN 1092-2, PN10, PN16 and PN25; ANSI Class 150
Face-to-face dimensions: EN 558-1, Series 1

Working Conditions
Pressure ratings: 1.0 MPa, 1.6 MPa and 2.5 MPa
Working temperature: −10 °C to 80 °C
Suitable medium: Water
End connections: PN10, PN16 and PN25
Consult the factory for other applications

Pressure Tests
Pressure tests according to EN 12266-1, Leakage Rate A, and GB/T 13927-1992
Body test pressure: 1.5 × PN, up to 24 bar
Seat test pressure: 1.1 × PN

EU Pressure Equipment Directive
Directive 2014/68/EU
Products up to DN300 are excluded under Article 1, §2(b)
Risk Category I, Module A, for sizes from DN350 to DN600
(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. 181A / PN 10-16 PRESSURE REDUCING VALVE

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