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RPKC

Relief valve from Sun Hydraulics

Description

Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.

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  • All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
  • Main stage orifice is protected by a 150-micron stainless steel screen.
  • Not suitable for use in load holding applications due to spool leakage.
  • Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
  • W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
  • Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-18A
Series 4
Capacity 200 gpm
Capacity (metric) 760 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Factory Pressure Settings Established at 4 gpm
Factory Pressure Settings Established at (metric) 15 L/min.
Maximum Valve Leakage at 110 SUS (24 cSt) 5 in³/min.@1000 psi
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 80 cc/min.@70 bar
Response Time – Typical 10 ms
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 5/8 in.
Valve Hex Size (metric) 41,3 mm
Valve Installation Torque 350 – 375 lbf ft
Valve Installation Torque (metric) 474 – 508 Nm
Adjustment Screw Internal Hex Size 5/32 in.
Adjustment Screw Internal Hex Size (metric) 4 mm
Locknut Hex Size 9/16 in.
Locknut Hex Size (metric) 15 mm
Locknut Torque 80 – 90 lbf in.
Locknut Torque (metric) 9 – 10 Nm
Model Weight 2.59 lb.
Model Weight (metric) 1.18 kg.
Seal kit – Cartridge Viton: 990018006

Configuration Options

Control

L ★ Standard Screw Adjustment
C Tamper Resistant – Factory Set
K Handknob
Q Capped and Lockwired
W Hex Wrench Adjustment
Y Tri-Grip Handknob
M Capped Screw Adjustment with Lockwire Holes

Adjustment Range

A ★ 100 – 3000 psi (7 – 210 bar), 1000 psi (70 bar) Standard Setting
W ★ 150 – 4500 psi (10,5 – 315 bar), 1000 psi (70 bar) Standard Setting
B 50 – 1500 psi (3,5 – 105 bar), 1000 psi (70 bar) Standard Setting
C 150 – 6000 psi (10,5 – 420 bar), 1000 psi (70 bar) Standard Setting
D 25 – 800 psi (1,7 – 55 bar), 400 psi (28 bar) Standard Setting
E 25 – 400 psi (1,7 – 28 bar), 200 psi (14 bar) Standard Setting
N 60 – 800 psi (4 – 55 bar), 400 psi (28 bar) Standard Setting
Q 60 – 400 psi (4 – 28 bar), 200 psi (14 bar) Standard Setting
K 75 – 1500 psi (5 – 105 bar), 1000 psi (70 bar) Standard Setting

Seal Material

N ★ Buna-N
V Viton
E EPDM

Material/Coating

/AP Stainless Steel, Passivated
/LH Mild Steel, Zinc-Nickel
Cavity: T-18A
Nominal Capacity: 200 gpm (760 lpm)
Downloads
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Possible variants

RPKC8DE, RPKC-8DE, RPKC8DN, RPKC-8DN, RPKC8DV, RPKC-8DV, RPKC8WE, RPKC-8WE, RPKC8WN, RPKC-8WN, RPKC8WV, RPKC-8WV, RPKCCAE, RPKC-CAE, RPKCCAN, RPKC-CAN, RPKCCAN/AP, RPKC-CAN/AP, RPKCCAN/LH, RPKC-CAN/LH, RPKCCAV, RPKC-CAV, RPKCCAV/AP, RPKC-CAV/AP, RPKCCAV/LH, RPKC-CAV/LH, RPKCCBE, RPKC-CBE, RPKCCBN, RPKC-CBN, RPKCCBN/AP, RPKC-CBN/AP, RPKCCBN/LH, RPKC-CBN/LH, RPKCCBV, RPKC-CBV, RPKCCBV/AP, RPKC-CBV/AP, RPKCCBV/LH, RPKC-CBV/LH, RPKCCCE, RPKC-CCE, RPKCCCN, RPKC-CCN, RPKCCCN/AP, RPKC-CCN/AP, RPKCCCN/LH, RPKC-CCN/LH, RPKCCCV, RPKC-CCV, RPKCCCV/AP, RPKC-CCV/AP, RPKCCCV/LH, RPKC-CCV/LH, RPKCCDE, RPKC-CDE, RPKCCDN, RPKC-CDN, RPKCCDN/AP, RPKC-CDN/AP, RPKCCDN/LH, RPKC-CDN/LH, RPKCCDV, RPKC-CDV, RPKCCDV/AP, RPKC-CDV/AP, RPKCCDV/LH, RPKC-CDV/LH, RPKCCEE, RPKC-CEE, RPKCCEN, RPKC-CEN, RPKCCEN/AP, RPKC-CEN/AP, RPKCCEN/LH, RPKC-CEN/LH, RPKCCEV, RPKC-CEV, RPKCCEV/AP, RPKC-CEV/AP, RPKCCEV/LH, RPKC-CEV/LH, RPKCCKE, RPKC-CKE, RPKCCKN, RPKC-CKN, RPKCCKN/AP, RPKC-CKN/AP, RPKCCKN/LH, RPKC-CKN/LH, RPKCCKV, RPKC-CKV, RPKCCKV/AP, RPKC-CKV/AP, RPKCCKV/LH, RPKC-CKV/LH, RPKCCNE, RPKC-CNE, RPKCCNN, RPKC-CNN, RPKCCNN/AP, RPKC-CNN/AP, RPKCCNN/LH, RPKC-CNN/LH, RPKCCNV, RPKC-CNV, RPKCCNV/AP, RPKC-CNV/AP, RPKCCNV/LH, RPKC-CNV/LH, RPKCCQE, RPKC-CQE, RPKCCQN, RPKC-CQN, RPKCCQN/AP, RPKC-CQN/AP, RPKCCQN/LH, RPKC-CQN/LH, RPKCCQV, RPKC-CQV, RPKCCQV/AP, RPKC-CQV/AP, RPKCCQV/LH, RPKC-CQV/LH, RPKCCWE, RPKC-CWE, RPKCCWN, RPKC-CWN, RPKCCWN/AP, RPKC-CWN/AP, RPKCCWN/LH, RPKC-CWN/LH, RPKCCWV, RPKC-CWV, RPKCCWV/AP, RPKC-CWV/AP, RPKCCWV/LH, RPKC-CWV/LH, RPKCKAE, RPKC-KAE, RPKCKAN, RPKC-KAN, RPKCKAV, RPKC-KAV, RPKCKBE, RPKC-KBE, RPKCKBN, RPKC-KBN, RPKCKBV, RPKC-KBV, RPKCKCE, RPKC-KCE, RPKCKCN, RPKC-KCN, RPKCKCV, RPKC-KCV, RPKCKDE, RPKC-KDE, RPKCKDN, RPKC-KDN, RPKCKDV, RPKC-KDV, RPKCKEE, RPKC-KEE, RPKCKEN, RPKC-KEN, RPKCKEV, RPKC-KEV, RPKCKKE, RPKC-KKE, RPKCKKN, RPKC-KKN, RPKCKKV, RPKC-KKV, RPKCKNE, RPKC-KNE, RPKCKNN, RPKC-KNN, RPKCKNV, RPKC-KNV, RPKCKQE, RPKC-KQE, RPKCKQN, RPKC-KQN, RPKCKQV, RPKC-KQV, RPKCKWE, RPKC-KWE, RPKCKWN, RPKC-KWN, RPKCKWV, RPKC-KWV, RPKCLAE, RPKC-LAE, RPKCLAN, RPKC-LAN, RPKCLAN/AP, RPKC-LAN/AP, RPKCLAN/LH, RPKC-LAN/LH, RPKCLAV, RPKC-LAV, RPKCLAV/AP, RPKC-LAV/AP, RPKCLAV/LH, RPKC-LAV/LH, RPKCLBE, RPKC-LBE, RPKCLBN, RPKC-LBN, RPKCLBN/AP, RPKC-LBN/AP, RPKCLBN/LH, RPKC-LBN/LH, RPKCLBV, RPKC-LBV, RPKCLBV/AP, RPKC-LBV/AP, RPKCLBV/LH, RPKC-LBV/LH, RPKCLCE, RPKC-LCE, RPKCLCN, RPKC-LCN, RPKCLCN/AP, RPKC-LCN/AP, RPKCLCN/LH, RPKC-LCN/LH, RPKCLCV, RPKC-LCV, RPKCLCV/AP, RPKC-LCV/AP, RPKCLCV/LH, RPKC-LCV/LH, RPKCLDE, RPKC-LDE, RPKCLDN, RPKC-LDN, RPKCLDN/AP, RPKC-LDN/AP, RPKCLDN/LH, RPKC-LDN/LH, RPKCLDV, RPKC-LDV, RPKCLDV/AP, RPKC-LDV/AP, RPKCLDV/LH, RPKC-LDV/LH, RPKCLEE, RPKC-LEE, RPKCLEN, RPKC-LEN, RPKCLEN/AP, RPKC-LEN/AP, RPKCLEN/LH, RPKC-LEN/LH, RPKCLEV, RPKC-LEV, RPKCLEV/AP, RPKC-LEV/AP, RPKCLEV/LH, RPKC-LEV/LH, RPKCLKE, RPKC-LKE, RPKCLKN, RPKC-LKN, RPKCLKN/AP, RPKC-LKN/AP, RPKCLKN/LH, RPKC-LKN/LH, RPKCLKV, RPKC-LKV, RPKCLKV/AP, RPKC-LKV/AP, RPKCLKV/LH, RPKC-LKV/LH, RPKCLNE, RPKC-LNE, RPKCLNN, RPKC-LNN, RPKCLNN/AP, RPKC-LNN/AP, RPKCLNN/LH, RPKC-LNN/LH, RPKCLNV, RPKC-LNV, RPKCLNV/AP, RPKC-LNV/AP, RPKCLNV/LH, RPKC-LNV/LH, RPKCLQE, RPKC-LQE, RPKCLQN, RPKC-LQN, RPKCLQN/AP, RPKC-LQN/AP, RPKCLQN/LH, RPKC-LQN/LH, RPKCLQV, RPKC-LQV, RPKCLQV/AP, RPKC-LQV/AP, RPKCLQV/LH, RPKC-LQV/LH, RPKCLWE, RPKC-LWE, RPKCLWN, RPKC-LWN, RPKCLWN/AP, RPKC-LWN/AP, RPKCLWN/LH, RPKC-LWN/LH, RPKCLWV, RPKC-LWV, RPKCLWV/AP, RPKC-LWV/AP, RPKCLWV/LH, RPKC-LWV/LH, RPKCMAE, RPKC-MAE, RPKCMAN, RPKC-MAN, RPKCMAV, RPKC-MAV, RPKCMBE, RPKC-MBE, RPKCMBN, RPKC-MBN, RPKCMBV, RPKC-MBV, RPKCMCE, RPKC-MCE, RPKCMCN, RPKC-MCN, RPKCMCV, RPKC-MCV, RPKCMDE, RPKC-MDE, RPKCMDN, RPKC-MDN, RPKCMDV, RPKC-MDV, RPKCMEE, RPKC-MEE, RPKCMEN, RPKC-MEN, RPKCMEV, RPKC-MEV, RPKCMKE, RPKC-MKE, RPKCMKN, RPKC-MKN, RPKCMKV, RPKC-MKV, RPKCMNE, RPKC-MNE, RPKCMNN, RPKC-MNN, RPKCMNV, RPKC-MNV, RPKCMQE, RPKC-MQE, RPKCMQN, RPKC-MQN, RPKCMQV, RPKC-MQV, RPKCMWE, RPKC-MWE, RPKCMWN, RPKC-MWN, RPKCMWV, RPKC-MWV, RPKCQAN, RPKC-QAN, RPKCQAV, RPKC-QAV, RPKCQBN, RPKC-QBN, RPKCQBV, RPKC-QBV, RPKCQCN, RPKC-QCN, RPKCQCV, RPKC-QCV, RPKCQDN, RPKC-QDN, RPKCQDV, RPKC-QDV, RPKCQEN, RPKC-QEN, RPKCQEV, RPKC-QEV, RPKCQKN, RPKC-QKN, RPKCQKV, RPKC-QKV, RPKCQNN, RPKC-QNN, RPKCQNV, RPKC-QNV, RPKCQQN, RPKC-QQN, RPKCQQV, RPKC-QQV, RPKCQWN, RPKC-QWN, RPKCQWV, RPKC-QWV, RPKCWAE, RPKC-WAE, RPKCWAN, RPKC-WAN, RPKCWAV, RPKC-WAV, RPKCWBE, RPKC-WBE, RPKCWBN, RPKC-WBN, RPKCWBV, RPKC-WBV, RPKCWCE, RPKC-WCE, RPKCWCN, RPKC-WCN, RPKCWCV, RPKC-WCV, RPKCWDE, RPKC-WDE, RPKCWDN, RPKC-WDN, RPKCWDV, RPKC-WDV, RPKCWEE, RPKC-WEE, RPKCWEN, RPKC-WEN, RPKCWEV, RPKC-WEV, RPKCWKE, RPKC-WKE, RPKCWKN, RPKC-WKN, RPKCWKV, RPKC-WKV, RPKCWNE, RPKC-WNE, RPKCWNN, RPKC-WNN, RPKCWNV, RPKC-WNV, RPKCWQE, RPKC-WQE, RPKCWQN, RPKC-WQN, RPKCWQV, RPKC-WQV, RPKCWWE, RPKC-WWE, RPKCWWN, RPKC-WWN, RPKCWWV, RPKC-WWV, RPKCYAE, RPKC-YAE, RPKCYAN, RPKC-YAN, RPKCYAN/AP, RPKC-YAN/AP, RPKCYAV, RPKC-YAV, RPKCYAV/AP, RPKC-YAV/AP, RPKCYBE, RPKC-YBE, RPKCYBN, RPKC-YBN, RPKCYBN/AP, RPKC-YBN/AP, RPKCYBV, RPKC-YBV, RPKCYBV/AP, RPKC-YBV/AP, RPKCYCE, RPKC-YCE, RPKCYCN, RPKC-YCN, RPKCYCN/AP, RPKC-YCN/AP, RPKCYCV, RPKC-YCV, RPKCYCV/AP, RPKC-YCV/AP, RPKCYDE, RPKC-YDE, RPKCYDN, RPKC-YDN, RPKCYDN/AP, RPKC-YDN/AP, RPKCYDV, RPKC-YDV, RPKCYDV/AP, RPKC-YDV/AP, RPKCYEE, RPKC-YEE, RPKCYEN, RPKC-YEN, RPKCYEN/AP, RPKC-YEN/AP, RPKCYEV, RPKC-YEV, RPKCYEV/AP, RPKC-YEV/AP, RPKCYKE, RPKC-YKE, RPKCYKN, RPKC-YKN, RPKCYKN/AP, RPKC-YKN/AP, RPKCYKV, RPKC-YKV, RPKCYKV/AP, RPKC-YKV/AP, RPKCYNE, RPKC-YNE, RPKCYNN, RPKC-YNN, RPKCYNN/AP, RPKC-YNN/AP, RPKCYNV, RPKC-YNV, RPKCYNV/AP, RPKC-YNV/AP, RPKCYQE, RPKC-YQE, RPKCYQN, RPKC-YQN, RPKCYQN/AP, RPKC-YQN/AP, RPKCYQV, RPKC-YQV, RPKCYQV/AP, RPKC-YQV/AP, RPKCYWE, RPKC-YWE, RPKCYWN, RPKC-YWN, RPKCYWN/AP, RPKC-YWN/AP, RPKCYWV, RPKC-YWV, RPKCYWV/AP, RPKC-YWV/AP

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