Prince Manufacturing Corporation products

Heavy duty welded construction. 3000 PSI. Bore sizes from 2.5" to 4.5". Stroke sizes 6" to 60". Chromed, ground & polished piston rod. Skived tubing. Ductile iron piston. Thread-in ductile gland. Urethane u-cup, metal encased wiper, teflon cap seal and wear ring. Crosstube end fittings with grease zerks.

1 -10 Work Sections. Extra Fine Spool Metering. Power Beyond Capability. Reversible Handle. Load Checks on Each Work Port. Hard Chrome Plated Spools. A Float Section can be Installed in any Location in Valve Assembly. Interchangeable Mounting With Other Popular “20” gpm Stack Valves. Optional Work Section with Pilot Operated Checks.

Extended Length Notches for Very Fine Metering. Machined Internal Lands for Precise Control and reduced Dead Band. Low Standby Pressures. Spool Design for reduced Flow Forces. Low Spool Actuating Forces. Use of Standard Series 20 Inlet Sections (20I) and Tie Rod Kits. Same Mounting Pattern and Envelope as Standard Series 20 Valve.

Standard Features: 1-10 Sections Per Valve Bank. Load Checks On Each Section. Hard Chrome Plated Spools. Compact Construction. Enhanced Metering Section Available in both the High and Low Sections. Differential Poppet Style Relief, Adjustable from 1500 to 3000 psi (Also available in Low Pressure Version Adjustable from 500 to 1500 psi). Power Beyond Capability. Reversible Handle. Mid-Inlet and Lock Valve Section available.

Economical monoblock construction of high tensile strength gray cast iron. Load check on each spool. Hard Chrome Plated Spools. Optional 4 Position Float on 1st spool. Differential poppet style relief, adjustable from 1500 to 3000 psi (also available in low pressure version adjustable from 500 to 1500 psi). Power beyond and closed center capability. Reversible Handle. Solenoid Actuated Option Available.

Economical monoblock construction of high tensile strength gray cast iron. Load check on each spool. Hard Chrome Plated Spools. Optional 4 Position Float and Joystick Handle. Differential poppet style relief, adjustable from 1500 to 3000 psi (also available in low pressure version adjustable from 500 to 1500 psi). Power beyond and closed center capability. Reversible Handle. Solenoid Actuated Option Available. Optional 4 Position Float and Joystick Handle. Ideal for loader application. Auto-Cycle configuration available (detailed description in RD5000 catalog pages).

Standard Features: Economical monoblock construction of high tensile strength gray cast iron. Load check on each spool. Hard Chrome Plated Spools. Optional 4 Position Float and Joystick Handle.

The PRINCE valve model SS is a manual 3-way 2 position selector valve. This valve will allow one pump source to supply two circuits. With the standard selector spool pulling the spool out diverts oil to port nearest handle, pushing the spool in diverts oil to the port away from the handle. The valve has an inlet on both the bottom and front of the valve body. Special options include lever handle and a float spool. The float spool connects the inlet to both outlets when the spool is pushed in and block both outlets when spool is pulled out.

Economical monoblock construction of high tensile strength gray cast iron. Load check on each spool. Hard Chrome Plated Spools. No face seals on spools. Adjustable cartridge relief. Power beyond available. 4 Position Series Float Spool for loader boom. 4 Position Regen Spool for loader bucket. Molded rubber boot. Patented dual spool lock joystick available.

The PRINCE valve model RD-1800 is a direct acting ball/spring type pressure relief. The valve is compact and simple in design. This type relief is fast opening and is well suited for pressure spike protection. The performance curves below indicate the low cracking pressure typical to ball/spring reliefs. Please refer to the model RV relief for a system pressure relief. The valve is available with a standard steel seat, model RD-1800S, or with a hardened seat, model RD-1800H. Both models are externally adjustable.