A Polyhydron Group Company
PILOT OPERATED
PRESSURE RELIEF VALVE
Model : PPR
Ref. No. D 04897
Release 11 / 2021
ENGINEERING - 1 of 3
78-80, Machhe Industrial Estate,
Machhe, Belgaum - 590 014. INDIA.
Phone : +91-(0)831- 2411001
Fax : +91-(0)831- 2411002
E-mail : polyhydron@gmail.com
Website : www.polyhydron.com
X P Y T
Two stage poppet type Relief valve.
Solenoid unloading or proportional relieving facility as an optional feature.
Vent connection for remote control.
Two standard sizes in Threaded construction.
Three standard sizes in Sub-plate mounting construction.
Description
Section
Hydraulic symbol
Unit dimensions
PP
Type B
P
T
P
XX
YY
Valve : Threaded body
H6
H5
H3
H4
B2
B1
G1/4
L5
G
ØD1 L3 L4
L1
P
X
Y
T
Y
T
X
P
Pressure adjusting screw( 4 A/F )
Handknob available as an
optional feature
Solenoid valve or Proportional relief valve
( Provision )
( Refer Note 1 on page 3.)
( Dimensions indicative only,
refer individual product catalogue.)
Port for external
pilot drain G1/4.
( Optional feature )
ØD2 hole, thru, 2 nos.
( 'M' size S.H.C.screw for mounting,
refer table No. 1 )
Size
Mass
kg.
G H1 H3
H4
H5 H6 L1 L2 L3 L4 L5 B1 ØD1B2 ØD2
131 25 10 57 100 85 43 62 12 33.5 66 3320
G1
4.8
170 42 13 80 138 100 54 72 18 41.5 86 4330 G1-1/29.5
44 9
60 11
Table No. 1
105
4
L7
L6
15
H2 ( with soln.)
H1 ( without soln.)
H2 L6 L7
140
178
153 155
162 163
L2
Dimensions in mm.
P
P
X
Y
XX X
Type A Type P
Type YBType YA Type YP
P
X
P
X
External pilot, Internal drain
External pilot, External drain
*
*
*
*
T T T
T
TT T
M
M8
M10
Y
A Polyhydron Group Company
D 04897 - PPR
ENGINEERING - 2 of 3
All rights reserved.
Subject to revision
B1
B2
L1
L2
L4
L3
L5
X
P
Y T
X
P
Y
T
ØD1, thru
( 'M' size S.H.C.screw,
For fixing screws refer table No. 2 )
Pressure adjusting
screw ( 4 A/F )
( Hand knob available
as an optional feature )
Size ØD2
13
32
4.8
6.3
6.3
80
120
155
12.9
35.9
47.3
0
23.8
31.8
L1 L2 L3 L4 L5 L6 L7 L8 B1 B2 B3 B4
23
M12
M16
M18
M
22.1
11.1
12.7
22.1
33.4
44.5
47.5
55.6
76.2
53.8
66.7
88.9
31.8
43.7
54.9
53.8
70
82.6
26.9
35
41.3
80
100
120
13.1
18.7
15 6.3
6.3
4.8
26
30
22
T2
L7
B2
B3
ØD2 max.
ØD1 max.
ØD3 max.
L8
L2
L3
L5
L6
X
P
Y
T
'M' Tapped hole,
T2 deep, 4 nos.
Ø7.5 hole,
8 deep.
B4
L4
L1
B1
120
115
143
150
167
182
80
120
155
4
4
4
12.9
35.9
47.3
53.8
66.7
88.9
13
18
20
80
100
120
53.8
70
82.6
4.8
6.7
12
Size
10
20
30
Valve fixing Screws
M12 x 100 L - 4 nos.
M16 x 90 L - 2 nos.
M18 x 120 L - 4 nos.
125 Nm
300 Nm
500 Nm
H1 H2 L1 L2 L3 L4 L5
Table No. 2
82
66
93
ØD1 B1 B2
Mass
kg
H2
H1
M
Valve : Subplate mounting
Interface details
ØD1 ØD3
105
L6
142
163
178.5
L6
15
Note : Surface roughness : Ra value is equal to or better than 0.8 µm
Surface flatness : 0.01 - 100 mm.
10
20
30
30
Tightening
Torque
Table No. 3
Solenoid valve or Proportional relief valve
( Provision )
( Refer Note 1 on page 3.)
( Dimension indicative only,
refer individual product catalogue.)
*
*
*
*
M16 x 50 L - 2 nos.
A Polyhydron Group Company
D 04897 - PPR
ENGINEERING - 3 of 3
All rights reserved.
Subject to revision
a
A B
P
T
Threaded body -
Subplate mounting -
Pressure relief valve
Pilot operated
Set screw -
Hand knob -
Threaded bodies -
Subplate mounting -
Internal drain - Omit
External drain -
Omit if not required
- Sol. Valve normally closed.
- Sol. Valve normally opened.
Note 1 : Solenoid ( refer spool type )
Spool Type
Provision for mounting solenoid valve
Pr. adjustment spring rating
Design code subject to change.
Installation dimensions remain
same for design code 10 thru 19.
Model Design code
PPR*10S
PPR*20S
PPR*30S
PPR*20T
PPR*30T
Construction ............................................... Two stage poppet valve.
Mounting .................................................... Threaded bodies - Company standards
Subplate mounting - ISO6264.
Mounting position ...................................... Optional.
Flow direction ............................................ From port P to port T.
Maximum Operating pressure
For port P and X ............... 315 bar.
For port T and Y ............... 210 bar.
( For model with solenoid valve mounting provision )
For port T and Y................. Max. pressure is equal to tank port pressure rating
of the valve mounted.
Hydraulic medium ...................................... Mineral oil.
Viscosity range ......................................... 10 cSt to 380 cSt
Fluid temperature range ............................. -20°C to +70°C
Fluid cleanliness requirement .................... ISO 4406 20/18/15 or better.
Maximum flow handling capacity ................ For valve size
10 ..........100 l/min
20 ..........200 l/min
30 ..........400 l/min
Mass .......................................................... Refer individual table.
Port pressure is additive to the setting of the valve.
Technical specifications
Ordering code
- Proportional relief valve.
PPR 10S S 100 Y A 15
A
B
P
S
T
S
H
Y
25, 50, 100, 200 & 315, 400 bar.
Size 10, 20 & 30
Size 20 & 30
15
14
14
15
14
*
*
