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Axial Check Valves
Axial Control & Isolation valves
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Axial Check Valve Range
In applications where forward flow can very quickly turn into reverse flow, ie high system decelerations, non-slam check valves are essential.
TYPE ZB - Single Spring Solid Disk
TYPE ZD - Single Spring Solid Disk
TYPE NB - Multi Spring Ring Disk
Standard Long Face-to-Face
TYPE NK - Multi Spring Ring Disk
Short Face-to-Face
TYPE ND - Multi Spring Ring Disk
API 6D Face-to-Face Dimensions
TYPE NZ - Single Spring Ring Disk (hybrid)
Standard Long Face-to-Face
TYPE NC - Single Spring Ring Disk (hybrid)
Short Face-to-Face
TYPE NA - Single Spring Ring Disk (hybrid)
API 6D Face-to-Face Dimensions
The axial design of the ZB range results in a streamlined flow path around the disc and high pressure recovery, minimising pressure drop across and maximising flow through the valve.
Features
Non-slam Closure
Low pressure loss
Retainerless is standard in Goodwin Check Valves
Very short face-to-face length
Very low weight
Maintenance free
Type ZB: Goodwin Standard Long Face-to-Face Dimensions
Size range: 1" to 10"
ANSI 150# - ANSI 2500#
API 2000 - API 20000
Valve design to ANSI B16.34
End Connections:
Flanged
Buttweld
Hub end
Compact flange
The axial design of the ZD range has the same streamlined flow path around the disc and high pressure recovery as the ZB but with a long face to face dimension in accordance to API 6D
Features
Non-slam Closure
Low pressure loss
Retainerless is standard in Goodwin Check Valves
Very short face-to-face length
Very low weight
Maintenance free
Type ZD: API 6F Long Face to Face
Size range: 1" to 10"
ANSI 150# - ANSI 2500#
API 2000 - API 20000
Valve design to ANSI B16.34
End Connections:
Flanged
Buttweld
Hub end
Compact flange
The NB employs the worldwide proven ring disc/radial guide design. With its friction free guiding and the aerodynamic flowpath through its two ring shaped flow ports, the NB is “best in class” for speed of response and flow capacity.
Features
Suitable for all liquids
Non-slam Closure
Very Low pressure loss
Friction-free valve disc guiding
Metal sealing
Maintenance free
Valve design to ASME B16.34
TYPE NB: Goodwin Standard Long Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Hub end
Compact flange
The NK is the compact model of ring disc/radial guide design. With its short face-to-face and reduced weight, the compact NK is a lower cost solution to the NB when marginally higher pressure drops can be accepted.
Features
Suitable for all liquids
Non-slam Closure
Low pressure loss
Friction-free valve disc guiding
Metal sealing
Short face-to-face length
Maintenance free
Low weight
Valve design to ASME B16.34
TYPE NK: Short Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Hub end
Wafer
Solid Lug
Compact flange
The ND provides the same proven ring disc/radial guide design as NB and friction free guiding with aerodynamic flowpath through its two ring shaped flow ports, but with a long API 6D face to face dimension.
Features
Suitable for all liquids
Non-slam Closure
Very Low pressure loss
Friction-free valve disc guiding
Metal sealing
Maintenance free
Valve design to ASME B16.34
TYPE ND: API 6D Long Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Hub end
Compact flange
The Hybrid NZ valve combines the hollow ring disc of the N type with the single spring guidance of the Z Type making it ideal choice of valve for low flow gas applications.
Features
Suitable for all gaseous fluids
Non-slam Closure
Very Low pressure loss
Metal sealing
Maintenance free
Valve design to ASME B16.34
TYPE NZ: Goodwin Standard Long Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Hub end
Compact flange
The NC is the compact model of the centrally guided ring disc design. With its short face-to-face and reduced weight,the compact NC is a lower cost solution to the NZ when marginally higher pressure drops can be accepted.
Features
Suitable for all gaseous fluids
Non-slam Closure
Very Low pressure loss
Metal sealing
Maintenance free
Valve design to ASME B16.34
TYPE NC: Short Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Wafer
Hub end
Solid Lug
Compact flange
With the NA the ring disc is centrally guided with a single spring. Utilising the same valve body as its sister valve the Type N, it provides the same internal flow profile and, consequently, the same minimal pressure loss as the Type N long API 6D Face-to Face dimensions
Features
Suitable for all gaseous fluids
Non-slam Closure
Very Low pressure loss
Metal sealing
Maintenance free
Valve design to ASME B16.34
TYPE NA: API 6D Face-to-Face Dimensions (for 12" and above)
End Connections:
Flanged
Buttweld
Wafer
Hub end
Solid Lug
Compact flange