CHECK VALVES
Check valves permit flow in one direction only, and close automatically if flow reverses. They are entirely automatic in action, depending upon pressure and velocity of flow within the line to perform their functions of opening and closing. Most Hattersley swing check valves can be installed in horizontal or vertical upward flow piping. Lift check valves must be used in horizontal lines only.
Hattersley offers four basic types of bronze check valves, namely:
• Horizontal lift check
• Vertical lift check
• Swing check
• Double check
Fig. 42
Bronze - Horizontal Lift Pattern
FEATURES & BENEFITS
• Robust and high quality bronze body
• Horizontal lift pattern
• Metal to metal seat for enhance sealing
• Taper threaded to BS EN 10226 ISO 7-1 (BS 21)
DIMENSIONAL DRAWING
Fig. 44
Bronze - Swing Pattern
FEATURES & BENEFITS
• Horizontal swing pattern
• Robust and high quality bronze body
• Metal to metal seat
• Check valves permit flow in one direction only and close automatically if flow reverses.
DIMENSIONAL DRAWING
Fig. 1013
Bronze - Horizontal Lift Pattern
FEATURES & BENEFITS
• Robust and high quality bronze body
• Horizontal lift pattern
• Taper threaded to BS EN 10226 ISO 7-1 (BS 21)
DIMENSIONAL DRAWING
Fig. 47
Bronze - Swing Pattern
FEATURES & BENEFITS
• Horizontal swing pattern
• Robust and high quality bronze body
• Metal to metal seat for enhance sealing
• Fig. 47 is taper threaded to BS EN 10226 ISO 7-1 (BS 21)
• Fig. 47.AT is ANSI threaded to B1.20.1 (Taper)
DIMENSIONAL DRAWING
Fig. 3047
Bronze - Swing Pattern
FEATURES & BENEFITS
• Horizontal swing pattern
• Robust and high quality bronze body
• Nitrile disc as standard with alternative materials available
• Taper threaded to BS EN 10226 ISO 7-1 (BS 21)
DIMENSIONAL DRAWING
Fig. 3047
Bronze - Swing Pattern
FEATURES & BENEFITS
• Horizontal swing pattern
• Robust and high quality bronze body
• Taper threaded to BS EN 10226 ISO 7-1 (BS 21)
• WRAS Approved to 85°C
DIMENSIONAL DRAWING
Fig.250W / Fig.250CW
Double Check Valves
FEATURES & BENEFITS
• Double check valves are used to prevent the risk of backflow and back siphonage contamination in domestic dwellings, public and commercial buildings
• WRAS Approved for use with wholesome (potable) water to 85°C
• Compression version supplied with ends complying with BS EN 1252-2 for use with BS EN 1057 R250 (half hard) copper tube or female taper threads complying with BS EN 10226-2
• Shell pressure rating for Fig. 250W and Fig. 250CW is PN16 with a maximum inlet/working pressure of 10 bar
• Compliant with BS EN 13959 ‘Anti- pollution check valves’ family E type D
DIMENSIONAL DRAWING
Fig.160W
Single Non-Return Valve
FEATURES & BENEFITS
• Spring loaded axially guided disc
• Positive non-slam shut-off
• WRAS approved for use with wholesome (potable) water to 85°C
• Resilient seat
• WRAS Approved fusion bonded epoxy internal and external coating
DIMENSIONAL DRAWING
Fig.260W
Double Non-Return Valve
FEATURES & BENEFITS
• 2 WRAS approved single non-return valves (to 85°C) bolted together
• Spring loaded axially guided disc
• Positive non-slam shut-off
• Resilient seat
• WRAS Approved fusion bonded epoxy internal and external coating
DIMENSIONAL DRAWING
Fig. M650
Cast Iron - Swing Pattern
FEATURES & BENEFITS
• Check valves permit flow in one direction only and close automatically if flow reverses
• Ideal for water or other liquids
• Bolted cover
• Swing type check valve with Bronze seat
• Suitable for mounting in horizontal and vertical pipelines
• Fusion Bonded Epoxy coating suitable for C3 environment
DIMENSIONAL DRAWING
Fig. M651 / 651ANSI
Cast Iron - Swing Pattern
FEATURES & BENEFITS
• Suitable for velocities of up to 3 metres/second
• Ideal for water or other liquids
• Bolted cover
• Suitable for mounting in horizontal and vertical pipelines
DIMENSIONAL DRAWING
Fig. 861 (PN16) / 861A (ANSI 125) / 866 (PN25) Fig. 861W (PN16)
FEATURES & BENEFITS
• Check valves permit flow in one direction only and close automatically if flow reverses, depending upon pressure and velocity of flow to perform the functions of the opening and closing
• Non-Slam design as a result of rubber seat and spring-assisted closure
• EPDM rubber seat to facilitate quiet operation and improve disk seating
• Eyebolt tapped holes in sizes DN200 and above, to fit eyebolts to BS EN 1S0 3226: 2010 (eyebolts are not supplied with valve)
• Design and construction lends itself to pump duty applications
• WRAS approved model 861W DN50 - DN300 for potable water applications rated PN16.
DIMENSIONAL DRAWING
