Description
Reliable Non-Return and Backflow Prevention Valves for Water, HVAC & Industrial Systems
Crane Fluid Systems Check Valves are designed to allow fluid to flow in one direction while automatically preventing reverse flow. Unlike manually operated isolation valves, check valves operate automatically according to the pressure and velocity of the fluid within the pipeline. This makes them an essential component for protecting pumps, equipment, pipework and water systems from unwanted backflow.
Crane Fluid Systems offers a broad range of check valves covering bronze, cast iron, ductile iron and cast steel constructions, with pressure ratings ranging from PN16 to PN32, as well as ANSI Class 125, Class 150 and Class 300options. The current Crane range includes 13 check-valve products across lift, swing and other check-valve configurations.
What Is a Check Valve?
A check valve, also known as a non-return valve (NRV), is an automatic valve designed to permit flow in one direction and close when the flow attempts to reverse.
The closing action is generated by the hydraulic conditions within the pipeline rather than by an external actuator. This makes check valves particularly useful for:
- Preventing reverse flow
- Protecting pumps
- Protecting heat exchangers
- Preventing backflow into water supplies
- Maintaining system pressure
- Protecting downstream equipment
- Preventing cross-flow between systems
Crane Fluid Systems states that its check valves operate automatically based on the pressure and velocity of flow within the line.
147XU
2″ to 24″
Swing Check Valve – Cast Steel
- 2″ to 24″
D135
1/2″ to 2″
Swing Check Valve with Metal Disc – Bronze
- 1/2″ to 2″
- Taper threaded to BS EN 10226-2 (UK)
D135AT – ANSI B1.20.1 (US)
D138
3/8″ to 3″
Swing Check Valve With Metal Disc – Bronze
- 3/8″ to 3″
- Taper threaded to BS EN 10226-2 (ISO 7-1) formerly BS 21
D140
1/2″ to 3″
Swing Check Valve With Resilient Disc – Bronze
- 1/2″ to 3″
- Taper threaded to BS EN 10226-2 (ISO 7-1) formerly BS 21
FM463 / FM466 / FA463
DN50 to DN600
Check Valves – PN16 / PN25 / ANSI125 – Ductile Iron
- DN50 to DN600
- Suitable for flange connection to BS EN 1092-2 PN16 / BS EN 1092-2 PN25
FM463W
DN50 to DN300
Check Valve – PN16
- DN50 to DN300
- UK End Connection: Suitable for flange connection to BS EN 1092-2 PN16 / BS EN 1092-2 PN25
US End Connection: BS 1560, ANSI B16.1, ANSI B16.5
FM492
50mm to 300mm
Check Valve – Cast Iron
- 50mm to 300mm
- Flanged BS EN 1092-2
-
Crane Check Valve Range
The Crane Fluid Systems range includes several different check-valve designs for different applications.
Product Type Size Range Pressure Rating Material D104 Lift Check Valve 1/4″–2″ PN20 Bronze D116 Lift Check Valve 1/4″–3″ PN32 Bronze D135 Swing Check Valve, Metal Disc 1/2″–2″ PN20 Bronze D138 Swing Check Valve, Metal Disc 3/8″–3″ PN25 Bronze D140 Swing Check Valve, Resilient Disc 1/2″–3″ PN25 Bronze D142 Swing Check Valve 1/4″–3″ PN32 Bronze F493 Swing Check Valve 2″–12″ Class 125 Cast Iron FM463 / FM466 / FA463 Check Valves DN50–DN600 PN16 / PN25 / ANSI 125 Ductile Iron FM463W Check Valve DN50–DN300 PN16 Ductile Iron FM469 Swing Check Valve 50–300 mm PN16 Cast Iron FM492 Swing Check Valve 50–300 mm PN16 Cast Iron 147XU Swing Check Valve 2″–24″ Class 150 Cast Steel 159XU Swing Check Valve 2″–12″ Class 300 Cast Steel The specifications above are taken from Crane Fluid Systems’ current Check Valves range.
Lift Check Valves
Crane’s D104 and D116 are bronze lift check valves.
Lift check valves use a disc or piston that moves vertically to permit flow and closes against its seat when flow reverses.
The D104 is rated PN20 and available from 1/4″ to 2″, while the D116 is rated PN32 and available from 1/4″ to 3″. Crane specifies that lift check valves should only be installed in horizontal pipe runs.
Typical Applications
Lift check valves are particularly useful for:
- Steam
- Air
- Gas
- Horizontal pipework
- General industrial services
Crane notes that horizontal lift check valves are primarily used for air, gas and steam services, while swing check valves are generally more suitable for water and other liquids.
Swing Check Valves
Swing check valves use a disc that swings away from the seat when flow moves in the correct direction. When flow reverses, the disc returns toward the seat to stop reverse flow.
Crane offers swing check valves in several configurations, including bronze, cast iron, ductile iron and cast steel.
Examples include:
- D135
- D138
- D140
- D142
- F493
- FM469
- FM492
- 147XU
- 159XU
The Crane D142, for example, is a PN32 bronze swing check valve available from 1/4″ to 3″.
Resilient-Seated Swing Check Valves
The D140 is a bronze swing check valve featuring a resilient disc.
It is available from 1/2″ to 3″ with a PN25 pressure rating and tapered threaded connections to BS EN 10226-2 (ISO 7-1).
Resilient seating can be particularly useful where improved shut-off performance is required.
Cast Iron Check Valves
For larger water and HVAC systems, Crane offers cast iron check valves including the FM469 and FM492.
The FM469 is a PN16 cast iron swing check valve available from 50 mm to 300 mm, with flanged connections to BS EN 1092-2 PN16. It features a bronze trim and resilient seat.
The FM492 is also a PN16 cast iron swing check valve, available from 50 mm to 300 mm, with flanged BS EN 1092-2 connections and a bronze seat. Its cast iron body has a fusion-bonded epoxy coating suitable for a C3 environment.
Ductile Iron Check Valves
For larger-diameter water and building-services systems, Crane provides the FM463 / FM466 / FA463 family.
This range covers DN50 to DN600 and includes PN16, PN25 and ANSI 125 configurations depending on the specific valve.
Crane also offers the FM463W, a PN16 check valve available from DN50 to DN300. It is WRAS approved and can be connected to BS EN 1092-2 PN16/PN25 as well as selected US flange standards.
Cast Steel Check Valves
For higher-pressure industrial applications, Crane offers the:
147XU
Class 150 cast steel swing check valve, available from 2″ to 24″.
159XU
Class 300 cast steel swing check valve, available from 2″ to 12″.
These valves extend the Crane check-valve range into higher-pressure industrial and process applications.
Check Valve Installation
Correct installation is important for reliable check-valve performance.
Crane notes that most of its swing check valves can be installed in:
- Horizontal pipework
- Vertical pipework with upward flow
However, lift check valves should only be installed in horizontal pipework.
The direction-of-flow arrow on the valve should always correspond with the intended direction of fluid flow.
Applications
Crane Fluid Systems check valves can be used across a wide range of systems, including:
HVAC
- Chilled water
- Heating water
- Cooling water
- Pump circuits
- Heat exchangers
Plumbing & Building Services
- Domestic water
- Commercial water systems
- Water distribution
- Pumped water systems
Industrial Applications
- Process water
- Compressed air
- Steam
- Gas
- Industrial utilities
Pump Protection
Check valves are commonly installed downstream of pumps to prevent reverse flow and help protect the pump and associated equipment.
Public Health Check Valves
Crane also offers a dedicated range of Public Health Check Valves for domestic and commercial water systems.
These include:
- D140W – Bronze Swing Check Valve
- D220W / D220CW – DZR Brass Double Check Valve
- FM463W – PN16 Check Valve
- D130W – Single Non-Return Valve
- D230W – Double Non-Return Valve
The public-health range includes WRAS-approved products designed for hot and cold water systems and backflow prevention.
Key Benefits
Automatic Operation
No external actuator is required. The valve opens and closes automatically according to the hydraulic conditions within the pipeline.
Backflow Prevention
Check valves prevent unwanted reverse flow that could damage equipment or contaminate water supplies.
Wide Material Selection
Crane offers bronze, cast iron, ductile iron and cast steel options for different applications and pressure requirements.
Wide Size Range
The overall Crane range extends from small 1/4″ valves through to large DN600 / 24″ valves.
Engineering Support
Many Crane check valves have BIM files available, supporting engineering design and digital building workflows.
Product Attributes
Attribute Value Brand Crane Fluid Systems Product Type Check Valve / Non-Return Valve Valve Function Backflow Prevention Operating Principle Automatic Valve Types Lift / Swing / Double Check Materials Bronze / Cast Iron / Ductile Iron / Cast Steel Pressure Range PN16–PN32 / ANSI Class 125–300 Size Range 1/4″–24″ / DN50–DN600 Applications HVAC, Plumbing, Water, Steam, Gas & Industrial Services BIM Available on many models WRAS Available on selected models
Why Choose Crane Fluid Systems Check Valves?
The Crane Fluid Systems Check Valve range provides engineers with a comprehensive selection of automatic backflow-prevention valves for building services, HVAC, plumbing, water distribution and industrial applications.
From compact bronze lift and swing check valves to large ductile iron and cast steel valves, the range covers a broad spectrum of sizes, pressures, materials and connection standards. This allows the appropriate check-valve configuration to be selected according to the application, fluid, pressure and installation requirements.
