5-53
5-53
2. BOOM PRIORITY EPPR VALVE
COMPOSITION
The boom priority EPPR valve is built in a manifold and mainly consisting of valve body and coil.
This EPPR valve installed under the solenoid valve.
CONTROL
The boom priority EPPR valve has to be controlled by a specific electronic amplifier card, which is
supplying the coil with a current 580 mA at 30
Ω
and 24 V.
1)
2)
21095MS14
OPERATING PRINCIPLE
Structure
3)
(1)
1
5
2
4
6
P
A
T
3
Control spool
1 O-ring
2 Support
ring
3 Valve
body
4 Coil
5 Connector
6 Cover
cap
Operation
In de-energized mode the inlet port (P) is closed and the outlet port (A) is connected to tank port
(T).
In energized mode the solenoid armature presses onto the control spool with a force
corresponding to the amount of current. This will set a reduced pressure at port A. The setting is
proportional to the amount of current applied.
Maximum pressure relief
If a pressure from outside is applied on port A the valve may directly switch to tank port (T) and
protect the system before overload.
(2)
(3)
P
T
A
P : Pilot supply line
T : Return to tank
A : Secondary pressure to flow MCV
Содержание HX130 LCR
Страница 11: ...1 1 SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Страница 174: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Страница 218: ...4 49 4 49 No of pin Receptacle connector female Plug connector male 14 1 7 6 14 MG610406 KET SDL CONNECTOR 13 ...
Страница 517: ...8 89 Insert O rings to the relief valve 30 and reassemble them to rear cover 20 This completes assembly 17 32038SM42 ...
Страница 536: ...8 108 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29 ...
Страница 545: ...8 117 125LCR8TM61 After assembling spring 44 in order clamp plug 41 Tightening torque 5 5 0 5 kgf m 39 8 3 6 lbf ft 31 ...
Страница 566: ...8 138 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...
Страница 577: ...8 149 14 15 3 Install cover 3 to body 1 and tighten bolts 14 Torque 10 12 5 kgf m 72 3 90 4 lbf ft 7 21078DA10 ...
Страница 609: ...8 181 1 STRUCTURE GROUP 11 WORK EQUIPMENT SECTION C SECTION B SECTION A 130ZF8DA44 SECTION A SECTION B SECTION C ...