Function and configurationsPressure control valves type DR series L5X are pilot operated pressure reducing valves. They are used to control secondary circuit in a system. They consist mainly of the ma...
Product Detail
Function and configurations
Pressure control valves type DR series L5X are pilot operated pressure reducing valves. They are used to control secondary circuit in a system. They consist mainly of the main valve (1) with main spool assembly (3) and pilot valve (2) with pressure adjustment element.
At static state, the valves are normally open, fluid flows free from port B to port A via the main spool (3). Pressure at port A acts on the underside of main spool(3) and its spring-loaded side via throttle orifice(4). Fluid also acts on the ball valve(6) of the pilot valve(2) via the channel (5). Meanwhile, pressure fluid flows via throttle orifice (7), control line (8),check valve (9) and throttle orifice (10) to the ball valve(6). Based on the setting value of the spring (11), control piston(13) keeps open, then fluid can flow free from port B to port A, until pressure at port A exceed the setting value of spring(11), and then ball valve (6) is opened. Control piston (13) moves to close position. When pressure at port A is balanced with setting value at spring, pressure reducing is achieved as expected. Control oil returns from spring chamber(14) to tank via channel (15).
A check valve(16) can be fitted optionally to give free return flow from line A to B.
Pressure gauge connection(17), used for monitoring the reduced pressure at the port A.
Symbols
Ordering code
Technical data
| Fluid | Mineral oil suitable for NBR and FKM seal | ||||||
| Phosphate ester for FKM seal | |||||||
| Fluid temperature range ℃ | -30 to+80 (NBR seal) | ||||||
| -20 to+80 (FKM seal) | |||||||
| Viscosity range m㎡/s | 10 to 800 | ||||||
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS 1638 or 20/18/15,ISO4406 | ||||||
| Max.operating pressure | Port B bar | 350 | |||||
| Operating pressure range | Port A bar | 10 to 350 | |||||
| Max.backing pressure | Port Y bar | 350 (only for without check valve); 315 (with check valve) | |||||
| Adjustable pressure | Max. bar | 50;100;200;315;350 | |||||
| Min. bar | Related with flow-rate (refer to the curves) | ||||||
| Size | DR10 | DR15 | DR20 | DR25 | DR30 | ||
| Max.flow-rate | Sub-plate L/min mounting | 150 | - | 300 | - | 400 | |
| Threaded L/min connection | 150 | 300 | 300 | 400 | 400 | ||
| Fixing position | Optional | ||||||
| Size | DR10 | DR15 | DR20 | DR25 | DR30 | ||
| Weight | Sub-plate mounting | DR kg | Approx.3.6 | - | Approx.5.3 | - | Approx.8.2 |
| Threaded connection | DR...G kg | Approx.5.3 | Approx.5.5 | Approx.5.1 | Approx.5.0 | Approx.5.0 | |
| DRC kg | Approx.1.2 | ||||||
| DRC30 kg | Approx.1.5 | ||||||
(Measured at oil =40°C +5°C,using HLP46) Characteristic curves
Unit dimensions
Sub-plate mounting
| Type | B1 | B2 | B3 | B4 | B5 | O-ring (PortA,B) | O-ring (PortX,) Y) | D | |||||
| DR10 | 85 | 50 | 66.7 | 58.8 | 7.9 | 17.12x2.62 | 9.25x1.78 | 13 | |||||
| DR20 | 102 | 59.5 | 79.4 | 73 | 6.4 | 28.17x3.53 | 9.25x1.78 | 22 | |||||
| DR30 | 120 | 76 | 96.8 | 92.8 | 3.8 | 34.52x3.53 | 9.25x1.78 | 30 | |||||
| Type | L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 | L9 | L10 | H1 | H2 | H3 |
| DR10 | 96 | 35.5 | 33 | 42.9 | 21.5 | - | 7.2 | 21.5 | 31.8 | 35.8 | 112 | 92 | 28 |
| DR20 | 116 | 37.5 | 35.4 | 60.3 | 39.7 | - | 11.1 | 20.6 | 44.5 | 49.2 | 122 | 102 | 38 |
| DR30 | 145 | 33 | 29.8 | 84.2 | 59.5 | 42.1 | 16.7 | 24.6 | 62.7 | 67.5 | 130 | 110 | 46 |
Unit dimensions
Threaded connections
Outline and installation dimension of Series 30 threaded connection valve:
| Type | B1 | D3 | H1 | H2 | H3 | H4 | L1 | L2 | L3 | D1 | D2 | T1 |
| DR10G | 63 | 9 | 27 | 125 | 10 | 62 | 85 | 11.5 | 62 | G1/2;M22x1.5 | 34 | 14 |
| DR15G | G3/4;M27x2 | 42 | 16 | |||||||||
| DR20G | 57 | G1;M33x2 | 47 | 18 | ||||||||
| DR25G | 70 | 11 | 42 | 138 | 13 | 64 | 100 | 14 | 72 | G1 1/4;M42x2 | 58 | 20 |
| DR30G | G1 1/2;M48x2 | 65 | 22 |
Unit dimensions
(DRC30) pilot valve with or (DRC30) without main spool assembly
