Catalog HY14-252/US Introduction Series C, CPO, F, PRD, PR, R anapak valves provide a variety of check, flow control, pressure relief and pressure reducing functions in a compact NFPA D3, D5 and D8 sandwich style valve. The NFPA D3 valve body conforms to the ISO 4 mm (1.57") thickness. These valves are mounted between directional control valves and their mounting surface. Check Valves Series C provide extra strength and durability for Positive shut-off is provided by a fully guided poppet and allows full flow in the unchecked position. Parker anapak C sandwich style check valves can be used either on the 'P', 'A', '', 'T' port or combination. Large internal flow paths allow high flow at low pressure drop. The NFPA D3 anapak valves may also be used in conjunction with Parker's Cartpak Series of sandwich valves which offer a wide variety of additional functions including relief, pressure reducing/relieving, load check, back pressure check, needle, flow control, pressure compensated flow control, crossover, relief and directional valves. C*AA C* C*AAF C*F C*DD C*DDF C*PT C*PP C*TT P. O. Check Valves Series CPO Parker anapak CPO sandwich style, pilot operated check valves can be provided in either single or double configurations. The pilot operated checks may be positioned in 'A' port or '' port; or both 'A' and '' ports. provide extra strength and durability for Positive shut-off is provided by a hardened poppet and cage assembly. Large internal flow paths allow high flow at low pressure drop. CPO*AA CPO*DD CPO* 252-1.p65, dd 2
Catalog HY14-252/US Introduction Series C, CPO, F, PRD, PR, R Control Valves Series F Parker anapak style F flow control valves can be provided in either single or double configurations. The flow controls may be positioned in 'P' port, 'A' port, '' port, or both 'A' and '' ports. provide extra strength and durability for Two step needles (standard) provide fine adjustment for the first three turns and course adjustment for the last three turns. Fine metering needles are available as an option. Large bypass checks allow high flow at a low pressure drop. Reversible (invert 18 ) for meter-in or meter-out (D3 & D5 only). F*AA (eter Out) F* (eter Out) F*DD (eter Out) F*PP (eter Out) Pressure Reducing Valves Series PRD PRD anapak sandwich valves may be selected to reduce pressure in the 'P' port, 'A' port or '' port. The direct operated, cushioned piston design results in fast response, low leakage and minimal hysteresis. Up to four pressure adjustment ranges are available with maximum pressure settings of 25, 64, 16 and 21 ar (363, 928, 232, 345 PSI). Adjustment options include: internal hex screw, hand knob or internal hex with keylock. Fluorocarbon seals are standard for multi-fluid compatibility. Available gage port connections include: SAE, NPT, SPP etric and ISO 6149. PRD*PP PRD*AA PRD* T P A T P A T P A 252-1.p65, dd 3
Catalog HY14-252/US Introduction Pressure Reducing Valves Series PR Parker anapak PR sandwich style pressure reducing valves can be used to reduce pressure on the 'P' port, the 'A' port, or the '' port. Three pressure adjustment options available: slotted screw, knob and locking knob. provide extra strength and durability for Series C, CPO, F, PRD, PR, R PR*AA PR* PR*PP Pressure Relief Valves Series R Parker anapak R sandwich style relief valve is a 'P' port to 'T' port relief. provide extra strength and durability for Three pressure adjustment options available: slotted screw, knob and locking knob. R*PT 252-1.p65, dd 4
Catalog HY14-252/US Technical Information Series PRD General Description Series PRD are direct operated pressure reducing valves that are used to regulate pressure in one area of a hydraulic circuit at a predetermined level below normal system pressure. Additionally, an integral pressure relieving function for the secondary reduced pressure circuit is incorporated into the design. Operation These valves are normally open devices that allow fluid to flow through the controlled port during their non-actuated or at rest condition. When downstream pressure exceeds the value set by the spring force, the control piston moves off its seat, closing off the flow path and thus reducing the fluid passing through from the main system. The cushioned piston modulates to maintain the preset pressure in this branch of the hydraulic circuit. If, due to external forces, the pressure continues to rise in this branch circuit, the piston will keep moving against the spring force allowing fluid to be drained to tank, thereby limiting maximum pressure to the valve s setting. Features PRD anapak sandwich valves may be selected to reduce pressure in the 'P' port, 'A' port or '' port. The direct operated, cushioned piston design results in fast response, low leakage and minimal hysteresis. Up to four pressure adjustment ranges are available with maximum pressure settings of 25, 64, 16 and 21 ar (363, 928, 232, 345 PSI). Adjustment options include: internal hex screw, hand knob or internal hex with keylock. Fluorocarbon seals are standard for multi-fluid compatibility. Available gage port connections include: SAE, NPT, SPP etric and ISO 6149. Specifications PRD2 PRD3 ounting NFPA D3, NFPA D5, Pattern CETOP 3, NG6 CETOP 5, NG1 aximum Operating Pressure P, A, 315 ar (456 PSI) 315 ar (456 PSI) T 1 ar (145 PSI) 1 ar (145 PSI) ax. 4 LP (1.5 GP) 8 LP (21 GP) Pressure Code Range Range 1 1. to 14 ar (15 to 2 PSI) 2 1.5 to 25 ar (22 to 363 PSI) 6 1.5 to 64 ar (22 to 928 PSI) 16 3 to 16 ar (44 to 232 PSI) 21* 3 to 21 ar (44 to 345 PSI) 35* 1 to 315 ar (147 to 456 PSI) Viscosity Range 12-23 cst (62-119 SSU) Filtration ISO Code 18/16/13 or etter * PRD2 only T P A 252-1.p65, dd 24
Catalog HY14-252/US Ordering Information Series PRD PRD Pressure Reducing/ Relieving anapak Code Description 2 NFPA D3 Subplate ounting 3 NFPA D5 Subplate ounting Code PP AA Size Port Reduction Option Description P Port Only A Port Only Port Only Pressure Range Option Adjustment Option Code V N Code Type L Hex w/key Lock S Internal Hex Screw Adj. K* Knob * PRD2 only Seal aterial Type Fluorocarbon Nitrile Gage Port Option Design Series NOTE: Not required when ordering. Code Type G G 1/4 SPP N 1/4 NPT Adapter 12 x 1.5 etric Adapter S SAE #4 (UNF-2 7/16-2) Adapter in PRD3 Y ISO 6149 etric Adapter 14x1.5 Code Description 1 1. to 14 ar (15 to 2 PSI) 2 1.5 to 25 ar (22 to 363 PSI) 6 1.5 to 64 ar (22 to 928 PSI) 16 3 to 16 ar (44 to 232 PSI) 21* 3 to 21 ar (44 to 345 PSI) 35* 1 to 315 ar (147 to 456 PSI) *PRD2 only. anapak olt Kits Size "2" anapak No. of & Valve olt olt Length anapaks Combination Kit mm (in) 1 anapak & D1 K243 73.2 (2.88) 2 anapak & D1 K225 111.3 (4.38) 3 anapak & D1 K244 152.4 (6.) 4 anapak & D1 K245 19.5 (7.5) olt Kits must be ordered separately. Size "3" anapak D3W-3 No. of & Valve D3DW & olt Length anapaks Combination D31VW* mm (in) 1 anapak & D3 K141 88.9 (3.5) 2 anapak & D3 K142 139.7 (5.5) 3 anapak & D3 K143 19.5 (7.5) * D31VW with internal pilot and internal drain only. Weights: PRD2 PRD3 1.3 kg (2.9 lbs.) 2.6 kg (5.8 lbs.) Schematics T P A T P A T P A PP Option AA Option Option 252-1.p65, dd 25
Catalog HY14-252/US Performance Curves Series PRD PSI 2 ar 13.8 PRD2**1 PSI ar 5 34.5 PRD2**2 15 1.4 1 6.9 5 3.5 4 27.6 3 2.7 2 13.8 1 6.9 LP GP -1-3.3-8 -6-15.1-7.6-4 -2 7.6 2 15.1 4 LP GP -1-3.3-8 -6-15.1-4 -7.6-2 7.6 2 15.1 4 22.7 6 3.3 8 37.9 1 PSI 12 ar 82.8 PRD2**6 PSI ar 3 27. PRD2**16 25 172.5 9 62.1 6 41.4 2 138. 15 13.5 1 69. 3 2.7 5 34.5 LP GP -1-3.3-8 -6-15.1-4 -7.6-2 7.6 2 15.1 4 22.7 6 3.3 8 37.9 1 LP GP -1-5 22.7 5 37.9 1 56.8 15 PSI 35 ar 241.5 PRD2**21 3 27. 25 172.5 2 138. 15 13.5 1 69. 5 34.5 LP GP -1-5 22.7 5 37.9 1 56.8 15 NOTE: Lowest settable pressure dependent upon system resistance. 252-1.p65, dd 26
Catalog HY14-252/US Installation Information CAUTION: anapak Installation Prior to installation of anapaks, please review flow paths. Due to the reversibility of the DO3 size, incorrect installation will alter the hydraulic circuit. Care must be taken during installation to insure that the anapak is installed in compliance with the hydraulic schematic. Please consult with your Parker representative with any questions that may arise. Pressure Ratings Unless otherwise specified, all Parker anapaks have continuous duty pressure rating as shown in this catalog. Special Requirements Consult your Parker representative for factory recommendations on such situations as: Installations that will operate at pressures higher than published catalog ratings. Use of hydraulic fluids which do not meet our recommended specifications. Operations where fluid temperature will exceed 121 C (25 F). Recommended ounting Surface Surface must be flat within.4 inch T.I.R. and smooth with 32 micro-inch. Series C, CPO, F, PRD, PR, R System Cleanliness Any hydraulic system that includes Parker valves should be carefully protected against dirt and fluid contamination. Life of the valves, as well as of all other components, will be greatly lengthened. Operation will be smoother and more precise. aintenance and repairs will be reduced. Lost production because of low pressure and flow will be minimized. Fluid contamination should be maintained to less than 5 particles larger than 1 micrometers per milliliter of fluid (SAE class 4 or better/iso Code 16/13). Hydraulic Fluids Parker recommends using top-quality hydraulic fluids having a viscosity range of 15 to 25 SSU (32 to 54 cst.) at 38 C (1 F). The absolute viscosity range should be 8 to 1 SSU (16 to 22 cst.). Fluids should have highest anti-wear characteristics and be treated to avoid rust and oxidation. Seals When used with water-glycol, water/oil emulsions, and high-grade petroleum base hydraulic fluids, Parker standard nitrile seals are suitable. When using phosphate ester fluids or their blends, specify Parker optional seals made of fluorocarbon. Synthetic fire-resistant fluids require special seal materials which your Parker representative can recommend. Torque Specifications The recommended torque valves are for the bolts which mount the valve to the manifold or subplate are as follows: Size Torque Valve 2 5.7 N.m. (5 in.-lbs.) 3 16.3 N.m. (12 ft.-lbs.) 6 18.5 N.m. (8 ft.-lbs.) 252-1.p65, dd 42
Catalog HY14-252/US Installation Information Series C, CPO, F, PRD, PR, R ounting Patterns ounting Surface for Directional Control Valve anifold 'TD. (NFPA, D3); CETOP 3 & NG 6 21.4 (.84) 5.8 (2.) 27. (1.6) 6.4 (.25) 54. (2.13) 37.3 (1.47) 16.7 (.66) 3.2 (.13) - - 91.2 (3.59) 75. (2.95) 46. (1.81) - A - 32.5 (1.28) T A P T O 11.2 (.441) max. P.A.. & T ports.56 L (.22) A ¼ 2UNC 2(6x1)th'd x 9.7 (.38) min. th'd depth 4 places.28 S (.11) A ounting Surface for Directional Control Valve (NFPA, D5); CETOP 5 & NG 1 252-1.p65, dd 43
Catalog HY14-252/US Installation Information Series C, CPO, F, PR, R ounting Patterns ounting Surface for Directional Control Valve (NFPA, D8); CETOP 8 & NG 25 252-1.p65, dd 44