INLET
(3)
REG
(1)
TANK
(2)
VENT
(4)
2
1
3
4
1PAA95/ 1PAAG95 PRESSURE REDUCING VALVES
PILOT OPERATED WITH RELIEF
1PAA95
Integrated Hydraulics Ltd Integrated Hydraulics Inc
Collins Road, Heathcote Ind. Est., Warwick, CV34 6TF, UK. 7047 Spinach Drive, Mentor, Ohio 44060, USA
Tel: +44 (0) 1926 881171 Fax: +44 (0) 1926 315729 Tel: (440) 974 3171 Fax: (440) 974 3170
Website: www.integratedhydraulics.com Website: www.integratedhydraulics.com
5-161.B
5
These pilot operated valves can be used with flows up
to 115 litres/min (30 US GPM) and reduced pressures
up to 210 bar (3000 psi), both in reducing and relieving
modes. Without the use of a separate relief valve it will
allow externally induced pressures on the regulated
line to relieve to tank. The vent port can also be used
for remote control applications.
This valve is normally open allowing inlet oil to pass to
the regulated line until the outlet (regulated) pressure
exceeds the setting of the pilot section. When this
setting is achieved a pilot flow occurs, causing a
pressure imbalance across the main spool, which
then moves, throttling the inlet flow and preventing any
further pressure rise in the regulated line. If any
external force causes the regulated pressure to rise
more than 5-10% above the setting, the main spool
moves back further, opening the regulated port to the
tank line, thus working as a relief valve.
SPECIFICATIONSAPPLICATION
OPERATION
Cuts costs - does two funtions in one valve. High
capacity reducing or relieving. Line or gasket mounted
models.
LINE MOUNTED
Figures based on: Oil Temp = 40
°C Viscosity = 40 cSt
FEATURES
Rated Flow
Reducing 115 litres/min (30 US GPM)
Relieving 115 litres/min (30 US GPM)
Pilot flow to tank approximately
0.4 litres/min (0.1 US GPM)
Inlet: 245 bar (3500 psi) max
Reg: 10 to 210 bar (150 to 3000 psi)
Max Setting
Body Material
Weight
Seal Kit Number
Recommended
Filtration Level
Operating Temp
Working parts hardened and ground
steel. External steel sufaces zinc
plated
1.19 kg (2.6 lbs)
1PAA95 SK201 (Nitrile)
SK201V (Viton)
1PAAG95 SK351 (Nitrile)
SK351V (Viton)
-20°C to +90°C
Line mountedMounting Position
Cartridge Material
Leakage
35 millilitres/min @ 280 bar
1 to 2 or 1 to 3
5 to 500 cSt
Nominal Viscosity
Range
1PAAG95
GASKET MOUNTED
VENT FEATURES
During normal operation of the valve, the vent port
must be blocked. Vent feature allows remote piloting or
two pressure systems.
Standard aluminium (up to 210 bar*)
Add suffix ‘377’ for steel option
BS5540/4 Class 18/13
(25 micron nominal)
*For applications above 210 bar please consult our technical department or use the steel body option.
4
31
2
8.00
26.20
4.00
12.70
4 HOLES ø10.3 THRO'
38.10
56.35
ø3.12
37.703.20
126.00
119.00
13.00
12.70
27.80
9.50
34.15
54.00
6.35
95.25
99.50 MAX
19.0
38.0
69.8
120.0
127.0
42.0
120.0
100.0 MAX
12.7
95.3
9.5
38.0
76.2
81.8 MAX
2 HOLES ø10.3 THRO'
2
1
3
PRESSURE-BAR
PRESSURE-PSI
FLOW LITRES/MIN
90
RELIEVING
120 3060 0
40
80
500
PRESSURE
REGULATING
6030 90
120
1000
1500
FLOW-US GPM
200
160
120
24
240
32 18 8 0
3000
2000
2500
18824
3500
32
ORDERING CODE EXAMPLE
We reserve the right to change specifications without notice
5-162.E
Basic Code
1PAA95 = Cartridge and Body line mounted
1PAAG95 = Cartridge and Body gasket mounted
Adjustment Means
P = Leakproof Screw Adjustment
R = Handknob Adjustment
G = Tamperproof Cap
(See page 5-102 for dimensions)
Port Sizes - Bodied Valves Only
4W = 1/2” BSP 8T = 1/2” SAE
6W = 3/4” BSP 12T = 3/4” SAE
10G = Gasket Ports - 14.5 mm (1PAAG95)
Seals
S = Nitrile (For use with most
industrial hydraulic oils)
SV = Viton (For high temperature
and most special fluid
applications)
5
Where measurements are critical request certified drawings
Pressure Range @ zero flow
10 = 7-100 bar. Std setting 70 bar
20 =10-210 bar. Std setting 100 bar
Std setting made at zero flow
(dead head)
1PAA*** 10P4W S
COMPLETE VALVE
BASIC CODE: 1PAA95 (LINE MOUNTED)
PRESSURE DROP
1/2” 3/4” PORTS
COMPLETE VALVE
BASIC CODE: 1PAAG95 (GASKET MOUNTED)
