Check Valves
Non-return valves that prevent reverse flow. Swing check and ball check valves in various materials and flange standards.
Ball Check Valve - Cast Iron FBE coated - Flanged
from 50mm
POA
Defender Valves
Ball Check Valve - Cast Iron FBE coated - Flanged
Ball Check Valve Duplex 2205 material
DN50 - DN300
POA
Defender Valves
Ball Check Valve Duplex 2205 material
Ball Check Valve - Stainless Steel 316 - Flanged T
from 50mm
POA
Defender Valves
Ball Check Valve - Stainless Steel 316 - Flanged T
Resilient Seated Swing Check Valve - Flanged Table
from 50mm
POA
Defender Valves
Resilient Seated Swing Check Valve - Flanged Table
Stainless Steel Swing Check Valve - Flanged ANSI 1
from 50mm
POA
Defender Valves
Stainless Steel Swing Check Valve - Flanged ANSI 1
Swing Check Valve - WCB - Flanged ANSI 150LB
DN50 to DN300
POA
Defender Valves
Swing Check Valve - WCB - Flanged ANSI 150LB
Swing Check Valve - WCB - Flanged ANSI 300LB
DN50 to DN100
POA
Defender Valves
Swing Check Valve - WCB - Flanged ANSI 300LB
About Check Valves
Check valves prevent backflow in piping systems by allowing flow in one direction only. We stock swing check valves (with a hinged disc) and ball check valves (using a floating ball) in stainless steel, ductile iron, and cast iron.
Applications
Key Features
- ✓Swing check valves - hinged disc design
- ✓Ball check valves - floating ball seals on backflow
- ✓Stainless steel 316 options
- ✓Cast iron with FBE coating
- ✓Table E and ANSI flange options
- ✓WRAS approved seals available
Swing Check vs Ball Check Valves
Swing Check Valves
Use a hinged disc that swings open with forward flow and closes under reverse flow or gravity. Best for horizontal lines or where low pressure drop is important.
- • Lower pressure drop than ball check
- • Suitable for larger pipe sizes
- • Resilient seated for bubble-tight seal
Ball Check Valves
Use a ball that lifts off the seat under forward flow and drops back to seal on reverse flow. Simple design with no moving parts to wear.
- • Simple, reliable operation
- • Works in any orientation
- • Good for slurry and wastewater
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