Double Check Valve (DCV) (DZR Brass Compression or Female BSPP)
Part Number: ED440
Product Overview
Double Check Valves with DZR brass Valve Bodies and compression or female BSP connections. Sprung-loaded Cartridges with resilient seats provide positive closure, no water hammer and low opening pressure. Hotstamped DZR compression nuts with fine thread minimises the torque required to make the joint.
Specification Clause
Compression
Every Double Check Valve assembly shall have a DZR brass body with compression fittings to BS864-2 – model ED440 - as distributed by Arrow Valves Ltd - Tel 01442 823123 www.arrowvalves.co.uk. The pressure drop across the assembly at 1.5 m/s pipe velocity shall be less than 0.35 bar. The body and compression connections shall be DZR brass.
Female
Every Double Check Valve assembly shall have a DZR brass body with female BSP connections – model ED440 as distributed by Arrow Valves Ltd - Tel 01442 823123 www.arrowvalves.co.uk. The pressure drop across the assembly at 1.5 m/s pipe velocity shall be less than 3.5 m. The body shall be DZR brass.
Application
• Backflow prevention for fluids in categories 1 – 3 (refer to Scheduled 1 of Water Regulations July 1999)
• Supply to flats and apartments – refer to Branch Valve
• Domestic wash basins, baths and showers – refer to ED235
• Domestic clothes and dishwashing machines (houses only)
• CWF primary and heating circuits (houses only with removable quick fill loop)
• Hose union taps (houses only - check valves in taps illegal)