Check Valves are non return valves that are available in various types of mounting. Tucson produces a variety of check and pilot check valves for line mountings, screw in cartridges, sub-plate mountings etc. Sub-plate mounted valves are available in commonly found interfaces of American and European standards. They are also available as sandwich construction in CETOP3 and CETOP5 sizes. These valves are zero leak and the load can be held in place for hours without losing its position. The valves are manufactured in Aluminium as well as Cast Iron bodies.

Check Cartridge		Line Mounted Check Valve
Cartridge check valves allow unidirectional flow at a low pressure. Various sizes of check cartridge are available with nominal flow ratings up to 200 litres/ minute. They fit into simply machined cavities and are therefore ideal for installation into custom designed manifolds.		Line Mounted check valves allow unidirectional flow at a low pressure drop, with cracking pressure of 1 or 5 bar in the free flow. Various port sizes are available with flow rating up to 200 lpm. These valves are available ready-to-install in pipelines.
Specifications:		Specifications:
Rated Flow: upto 200 lpm Maximum Pressure: 350 bar Manifold Material: Aluminium/Cast Iron Working Parts: Hardened and ground steel External Surface: Zinc plated surfaces Leakage: 0.3 millilitres/min (5 dpm) @ 280bar		Rated Flow: upto 200 lpm Maximum Pressure: 350 bar Working Parts: Hardened and ground alloy steel External Surface: Zinc plated Carbon Steel Leakage: 0.3 millilitres/min (5 dpm) Sizes: G¼ to G1
Features:		Features:
All steel body provides high durability Long Service life for hassle free maintainance Easy to service due to compact size Standard cavity for ease of installation		Capable of handling high flows rates All steel body provides high durability Standard BSP Ports allow easy assembly Toughened poppets for "Zero-Leak" seating
Typical Application:		Typical Application:
Cavitation control, Circuit isolation, Load holding in Scissor Lifts		Flow direction control, cavitation control, circuit isolation

Subplate Mounted Check Valve		Pilot Check Cartridge
Subplate Mounted check valves allow unidirectional flow at a low pressure drop, with cracking pressure of 1 or 5 bar in the free flow. Various subplate sizes are available with flow rating up to 150 lpm. These valves are available ready-to-install in pipelines.		Pilot check valves allow flow to pass in one direction, with a low pressure drop, and prevent reverse flow until pilot pressure is applied. There are many applications for this valve type, the most common being to lock and hold an actuator.
Specifications:		Specifications:
Rated Flow: upto 100 lpm Maximum Pressure: 350 bar Manifold Material: SG Iron Working Parts: Hardened and ground steel External Surface: Zinc plated surfaces Leakage: 0.3 millilitres/min (5 dpm) @ 280bar		Rated Flow: upto 200 lpm Maximum Pressure: 350 bar Manifold Material: Aluminium/Cast Iron Working Parts: Hardened and ground alloy steel External Surface: Zinc plated Carbon Steel Leakage: 0.3 millilitres/min (5 dpm) @ 280bar
Features:		Features:
Standard mounting interface for interchangability Larger flow rate capacity SG Iron body provides a higher pressure rating Metal sealing ensures low leakage rate		All steel body provides high durability Included Pilot port eliminates need for matched pusher Heat treated parts ensure long service life Stable performance providing small pressure drops
Typical Application:		Typical Application:
Quick Pressure Release Systems, Implement Pressure Limiting, Injection Moulding Machines		Locking Stabilizer cylinders, locking clamping cylinders, isolating auxillary circuits

Line Mounted Pilot Check Valve		Subplate Mounted Pilot Check Valve
The Direct Relief Valve is ideally suited for use as a pilot valve or a thermal relief and it’s an economical solution for small flow systems where a fast response is required. Pressure on the nose of the cartridge acts over the seat area moving the poppet against the spring, this allows relief flow to vent into the tank.		Sequence valves provide ordered sequencing of two or more operations as with clamp and drill circuits. They can also be used as relief valves where the downstream pressure is high or changes during operation. By taking the drain line directly to tank, back pressure effects are negated.
Specifications:		Specifications:
Rated Flow: upto 60 lpm Maximum Pressure: 350 bar Manifold Material: Aluminium/Cast Iron Working Parts: Hardened and ground steel External Surface: Zinc plated surfaces Leakage: 0.3 millilitres/min (5 dpm) @ 280bar		Rated Flow: upto 200 lpm Maximum Pressure: 350 bar Manifold Material: Aluminium/Cast Iron Working Parts: Hardened and ground alloy steel External Surface: Zinc plated Carbon Steel Leakage: 1200 millilitres/min (1.2 lpm)
Features:		Features:
Aluminium manifold body provides lightweight durability Heat treated parts ensure long service life Stable performance providing small pressure drops		SG Iron body provides durability Heat treated parts ensure long service life Stable performance providing small pressure drops
Typical Application:		Typical Application:
Locking clamping cylinders, Auxillary airport equipment, Isolating circuit elements		Power packs for Machine tools, Holding Press cylinders

Dual Pilot Check Valve		Hose Burst Valve
Dual Pilot Check valves work in tandem providing pilot pressure for each other and locking pressure when required. They are most often used as load holding valves where the actuator is to be held in place against load until it is retracted.		Hose Burst Valves or Velocity Fuses are used to prevent the uncontrolled descent of a load in the event of a hose failure. They should be screwed directly into the lifting device (normally a cylinder), or into an in-line manifold that should be mounted as close as possible to the lifting device.
Specifications:		Specifications:
Rated Flow: upto 60 lpm Maximum Pressure: 350 bar Manifold Material: Aluminium/Cast Iron Working Parts: Hardened and ground steel External Surface: Zinc plated surfaces Leakage: 0.3 millilitres/min (5 dpm) @ 280bar		Rated Flow: upto 200 lpm Maximum Pressure: 350 bar Manifold Material: Carbon Steel Working Parts: Hardened and ground alloy steel External Surface: Zinc plated Carbon Steel Leakage: 0.3 millilitres/min (5 dpm) @ 280bar
Features:		Features:
Zero Leak Ensures proper holding of actuators Long Service life for hassle free maintainance Stable performance providing small pressure drops		Capable of handling high flows rates Can be screwed into pre existing piping Easy to install
Typical Application:		Typical Application:
Locking Stabilizer cylinders, Clamping cylinder and Crane Booms		Crane Booms, Fork lifts, Excavators, Tippers, Scissor Lifts, Aerial Platforms, sSkip trucks etc.

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