Valves

Hydrant Valves are designed to B. S 2060, B. S 5041, B.S 5041 Part2.

Inlet : flanged or threaded to international standards.

Outlet : 65mm ( 2 ½" ) female instantaneous. Full range of pattern including OBLIQUE, BIBNOSE and 30O to 90O types are available. Body made of gunmetal or brass with renewable hard composition rubber disc. Chrome plated valves on request, valves are manufactured to class 200 rating or PN32 designation. Blanking caps and plugs supplied on request.

Regulator Controlled Pressure Hydrant Valves
Operation:
Both "E" type and stanley type pressure regulators incorporates a spring loaded balanced pressure reducing valve combined with hydrant stop valve. Positive outlet pressure control is achieved by aventure section in the outlet flow away.

The pressure rise in " shut off" conditions is minimal under sever frost conditions, the regulator should be suitably protected to prevent any residual water in the regulator from freezing and adversely affecting its operation.

Applications: Fire mains systems in high rise buildings, for high pressure systems on oil rig platforms and in oil refineries and chemical plants. In conditions where length of water mains lead to high pressure drop where low pressure conditions are produced by pump characteristics.

Pressure Range: Out let : 4.1 to 5.5 bar.
5.5 to 8.3 bar.
Inlet : 4.8 to 20.7 bar.

Connections:

Outlet : 2 ½" instantaneous female coupling to B.S 336.
Inlet : 1 ½" flanged ANSI150; suitable for B.S 4504 PN 16, B. S 10 Table H and DIN ND 16.
Blank cap and chain fitted as standard.


Air Release Valve:
An air release valve is fitted at the highest point in the installation to allow air to discharge when the rising main is filled and re-enter when the rising main is drained.

The automatic air release valves are manufactured from gunmetal brass and are available with 3/4" or 1" male threaded inlet.

* In the interest of product development, we reserve the right to amend specifications without prior notice.
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© 2004 BRISTOL Fire Engineering