In-Line Check Valve

2-1/2" Face, 1/4" NPT Bottom Stem (Glycerin Filled)

2-1/2" Face, 1/4" NPT Center Stem (Glycerin Filled)

Best value for precise control of air and hydraulic fluids where a calibrated knob is required.

The Model DS 2-Position Double Selector Valve directs the flow of hydraulic oil to two separate circuits. This permits operation of two double-acting cylinders with one four-way control valve or four single-acting cylinders with two three-way control valves. The hydraulic circuit which is to be operated should be selected before pressure is applied. Valve is of the open crossover type. As spool is moved and one set of outlet ports start to close, the other set of outlet ports start to open.

The Prince DS Valve is a manual 6-way, 2 position double selector valve. This valve will divert the flow going to two separate hydraulic circuits. For example, two double acting cylinders or two reversible hydraulic motors can be operated by one four-way valve. When the double selector spool is pushed in, the top ports are connected to the right ports. When the selector spool is pulled out, the top ports are connected to the left ports. An optional series/parallel spools is also available. This spool will run two reversible hydraulic motors in series when the spool is out and in parallel when the spool is pushed in.

LO Lock Valves are designed to lock a cylinder, or part of a circuit, without leakage while a control valve is in a neutral position. Lock Valves function as check valves, allowing flow to a cylinder and blocking reverse flow until pilot pressure is applied to "unlock" the circuit. These valves may be used to prevent movement of a load while the pressure source is inactive.

SAE 1/4" blade terminals standard.

The Model PD, Proportional-Type, Pressure-Compensated Flow Divider offers an efficient means of proportionally dividing a single flow of hydraulic oil. The flow ratio from the outlet ports remains constant despite load differences between the ports. Outlet flow ratios are preset at the factory and a range of ratios from 50/50 to 90/10 are available. Flow through the Model PD Divider cannot be reversed. It is a flow divider only - not a flow combiner. A Model PDC with a combiner feature is offered by substituting a combiner spool assembly for a standard spool. This feature not only divides flow, but flow may be combined in reverse direction and synchronized in both directions. It is only available with a 50/50 flow dividing ratio. Neither model, however, should be constructed as a flow regulator. If other ratios are required with the combiner feature, contact us.

The RD-400 is a constant volume priority divider. It can be used in applications where two circuits are to be supplied by a single pump such as power steering sytems. In operation the flow of oil supplied to the inlet is divided into two flows, the priority flow and the excess flow. The priority flow will remain nearly constant with variations in pressure on either the priority or excess flow port and will also remain nearly constant with variations in the inlet flow. The RD-400R provides the same function as described above with the addition of a built-in pressure relief for the priority port only. This relief is factory set at 1500 psi.

The RD-500 is an adjustable constant volume priority divider. This valve provides the same function as the Model RD-400 except the priority flow is adjustable from 2 gpm to 12 gpm. The priority flow is set using the adjusting screw and is then locked in place to maintain setting. This allows setting to be fine tuned in the field to the exact flow needed.

The RD-500P is a pressure compensated propertinal flow divider with one fixed and one adjustable orifice. On this valve, the divider ratio can be changed in the field.

The Model LT & LTF Valves will operate satisfactorily when installed in any position.  These valves may be used as Line Check Valves, permitting full flow of hydraulic oil in one direction only. 

Models S & SM offer a simple method of directing system flow to one or the other of two separate lines. An example of this is the operation of two single-acting cylinders, independent of each other, with one three-way control valve. Since the S & SM spools are of open-crossover design, they should be shifted before pressure is applied.

Economically designed for effective control of air and hydraulic fluids where frequent adjustment is not required.

Features:

• Low carbon steel with a maximum carbon equivalent of 0.45
• Design offers minimum welding distortion
• Pilot minimizes installation fixturing

NOTE:  Use proper ventilation when welding

Sight plugs are designed for quick visual inspection of liquid

Features:

• Low carbon steel with a maximum carbon equivalent of 0.45
• Design offers minimum welding distortion
• Pilot minimizes installation fixturing

NOTE:  Use proper ventilation when welding

We are a distributor for Zero-Max. We carry several items from the Zero-Max line including Model 200-SAE "A" Mount, Model 300-SAE "A" Mount, Model 400, Model 500-SAE "A" Mount, and Model 600-SAE "B" Mount. More items are available. Please contact our Service Department for more information and/or to order.

Pictures of each model type on order page.

Parker's DVG20 control valve has a well proven record for reliability in controlling fluid power.  They are made from compacted graphite, a high strength iron alloy that allows for a 3500 PSI rating.  Also features symmetrically timed spools, which allows for easy removal and reversal of spool for left or right hand operation and offers a wide range of function configurations, assuring that a control valve meeting your specific needs is just an e-mail away!

Parker's V20 directional control valve is a proven performer in this market.  It has very low pressure drops and optimized metering spools designed specifically for these machines.  V20 Series valves extension and retraction of cylinders, rotation of fluid motors and actuators, and sequence other circuit operations.  This valve is available for parallel, tandem, combined parallel/tandem, and series hydraulic circuit applications up to 3500 PSI (242 bar) continuous operating pressure.  With lighter spool actuating effort for finger tip touch and extra fine metering, the V20 Series is ideal for back hoe, front end loader and personnel lift applications.

Prince Hydraulic Cylinder Breathers