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Pressure reducing/relieving valve from Sun Hydraulics

Description

Pilot-operated, pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3).

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  • These valves have the main stage orifice drilled into the piston rather than a staked-in orifice. This allows the valve to survive physically demanding applications.
  • Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
  • Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
  • Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
  • Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
  • Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
  • If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
  • 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.
  • All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
  • 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-2A
Series 2
Capacity 20 gpm
Capacity (metric) 80 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Factory Pressure Settings Established at blocked control port (dead headed)
Control Pilot Flow 10 – 15 in³/min.
Control Pilot Flow (metric) 0,16 – 0,25 L/min.
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 1/8 in.
Valve Hex Size (metric) 28,6 mm
Valve Installation Torque 45 – 50 lbf ft
Valve Installation Torque (metric) 61 – 68 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 0.60 lb.
Model Weight (metric) 0.27 kg.
Seal kit – Cartridge Viton: 990202006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment
O Handknob with Panel Mount

Adjustment Range

A 100 – 3000 psi (7 – 210 bar), 200 psi (14 bar) Standard Setting
B 50 – 1500 psi (3,5 – 105 bar), 200 psi (14 bar) Standard Setting
N 60 – 800 psi (4 – 55 bar), 200 psi (14 bar) Standard Setting
Q 60 – 400 psi (4 – 28 bar), 200 psi (14 bar) Standard Setting
W 100 – 5000 psi (7 – 350 bar), 200 psi (14 bar) Standard Setting
D 25 – 800 psi (1,7 – 55 bar), 200 psi (14 bar) Standard Setting
E 25 – 400 psi (1,7 – 28 bar), 200 psi (14 bar) Standard Setting
H 30 – 3000 psi (2 – 210 bar), 200 psi (14 bar) Standard Setting
J 25 – 1500 psi (1,7 – 105 bar), 200 psi (14 bar) Standard Setting
K 75 – 1500 psi (5 – 105 bar), 200 psi (14 bar) Standard Setting
S 25 – 200 psi (1,7 – 14 bar), 100 psi (7 bar) Standard Setting

Seal Material

N Buna-N
V Viton
Cavity: T-2A
Nominal Capacity: 80 lpm (20 gpm)
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Possible variants

PPFF8DN, PPFF-8DN, PPFF8DV, PPFF-8DV, PPFF8WN, PPFF-8WN, PPFF8WV, PPFF-8WV, PPFFCAN, PPFF-CAN, PPFFCAV, PPFF-CAV, PPFFCBN, PPFF-CBN, PPFFCBV, PPFF-CBV, PPFFCDN, PPFF-CDN, PPFFCDV, PPFF-CDV, PPFFCEN, PPFF-CEN, PPFFCEV, PPFF-CEV, PPFFCHN, PPFF-CHN, PPFFCHV, PPFF-CHV, PPFFCJN, PPFF-CJN, PPFFCJV, PPFF-CJV, PPFFCKN, PPFF-CKN, PPFFCKV, PPFF-CKV, PPFFCNN, PPFF-CNN, PPFFCNV, PPFF-CNV, PPFFCQN, PPFF-CQN, PPFFCQV, PPFF-CQV, PPFFCSN, PPFF-CSN, PPFFCSV, PPFF-CSV, PPFFCWN, PPFF-CWN, PPFFCWV, PPFF-CWV, PPFFKAN, PPFF-KAN, PPFFKAV, PPFF-KAV, PPFFKBN, PPFF-KBN, PPFFKBV, PPFF-KBV, PPFFKDN, PPFF-KDN, PPFFKDV, PPFF-KDV, PPFFKEN, PPFF-KEN, PPFFKEV, PPFF-KEV, PPFFKHN, PPFF-KHN, PPFFKHV, PPFF-KHV, PPFFKJN, PPFF-KJN, PPFFKJV, PPFF-KJV, PPFFKKN, PPFF-KKN, PPFFKKV, PPFF-KKV, PPFFKNN, PPFF-KNN, PPFFKNV, PPFF-KNV, PPFFKQN, PPFF-KQN, PPFFKQV, PPFF-KQV, PPFFKSN, PPFF-KSN, PPFFKSV, PPFF-KSV, PPFFKWN, PPFF-KWN, PPFFKWV, PPFF-KWV, PPFFLAN, PPFF-LAN, PPFFLAV, PPFF-LAV, PPFFLBN, PPFF-LBN, PPFFLBV, PPFF-LBV, PPFFLDN, PPFF-LDN, PPFFLDV, PPFF-LDV, PPFFLEN, PPFF-LEN, PPFFLEV, PPFF-LEV, PPFFLHN, PPFF-LHN, PPFFLHV, PPFF-LHV, PPFFLJN, PPFF-LJN, PPFFLJV, PPFF-LJV, PPFFLKN, PPFF-LKN, PPFFLKV, PPFF-LKV, PPFFLNN, PPFF-LNN, PPFFLNV, PPFF-LNV, PPFFLQN, PPFF-LQN, PPFFLQV, PPFF-LQV, PPFFLSN, PPFF-LSN, PPFFLSV, PPFF-LSV, PPFFLWN, PPFF-LWN, PPFFLWV, PPFF-LWV, PPFFOAN, PPFF-OAN, PPFFOAV, PPFF-OAV, PPFFOBN, PPFF-OBN, PPFFOBV, PPFF-OBV, PPFFODN, PPFF-ODN, PPFFODV, PPFF-ODV, PPFFOEN, PPFF-OEN, PPFFOEV, PPFF-OEV, PPFFOHN, PPFF-OHN, PPFFOHV, PPFF-OHV, PPFFOJN, PPFF-OJN, PPFFOJV, PPFF-OJV, PPFFOKN, PPFF-OKN, PPFFOKV, PPFF-OKV, PPFFONN, PPFF-ONN, PPFFONV, PPFF-ONV, PPFFOQN, PPFF-OQN, PPFFOQV, PPFF-OQV, PPFFOSN, PPFF-OSN, PPFFOSV, PPFF-OSV, PPFFOWN, PPFF-OWN, PPFFOWV, PPFF-OWV