The DH6i fire hydrant pressure reducing valve is the latest evolution of the DH range of hydrant reducing valves. As with all the predecessors the valve has been fully designed and tested in accordance with BS5041. This new design has been developed under our approved ISO 9001 design system. The valve is suitable for all fire fighting applications where pressure reduction is required, a balanced inlet design ensures a constant outlet pressure, regardless of any fluctuations in the inlet pressure.
This range of valves are manufactured in a variety of materials, which include Gunmetal, Stainless Steel, Duplex Stainless Steel and Titanium. The valve has a flanged inlet to customers requirements, and a quick release instantaneous coupling outlet. The Inlet pressure is 20.0 Barg maximum with a reduced pressure range of 4.0 to 8.0 Barg.
Specification
The reduced pressure can be adjusted via the adjusting cap, this design has several advantages over conventional adjusting screw designs. These include the fact that no threads are exposed, making it virtually impossible to damage them. It is also more robust and able to cope with accidental knocks.
The valve is locked in position with a locking wire and seal. This not only prevents the adjusting cap from moving, maintaining a specific reduced pressure, but also provides a simple indication to whether the valve has been tampered with. When the valve is in the closed position it has no water pockets. This means the valve is not effected by freezing, making it ideal for use in sub-zero conditions.
Description of Action
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Installation Instructions
All valves should be fitted with the centre line in the vertical position and the hand wheel to the top, flow in the direction of the arrow cast on the side of the body. The pipe must be clean and free from foreign bodies which may damage the valve. All valves are supplied with blanking caps, these should be removed before fitting the valve into the pipe work.
Maintenance Information
We recommend that the valve is overhauled a minimum of once a year. During the overhaul the valve spring, nitrile components and guides should be checked. All guides should move freely. The spring should be replaced if there is any corrosion or the coils show signs of thinning. Nitrile components should be replaced at the first sign of wear.
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Broady Flow Control Limited
English Street, Kingston upon Hull, East Yorkshire, HU3 2DU
Tel: 44 (0) 1482 619601 Fax: 44 (0) 1482 619701
