Catalog HY15-3502/US Load Control Valve

Technical Information Series E2A300, E2C300

General Description
Threaded Cartridge Style Counterbalance Valve.
Pilot assisted, designed for motion control
applications. For additional information see
Technical Tips on pages LM1-LM4.

Features
• Poppet construction for minimal leakage
• Incorporates direct acting relief valve for overload
protection, and reverse check valve, saving space and
minimizing installation cost
• Two pilot ratios available, 3:1 for cylinders and 8:1 for
motor control (1)
(3)
• Hardened working parts for maximum durability
(3)
• Adjustable and tamper resistant versions also available
(2)
• All external parts zinc plated
(2)

(1)

Specifications Performance Curves

Relief & Pilot Performance 1 to 2
Rated Flow 350 LPM (92 GPM)
PSI Bar Hydraulic Oil 150 SSU @ 100°F (32 cSt)
5800 400
Pressure 50 - 350 Bar (725 - 5000 PSI)
RELIEF
Pressure Drop Bar, PSI

Sensitivity: 45 Bar (653 PSI) 4350 300

Pressure/Turn

Pilot Ratio E2A300 - 8 : 1 2900 200

E2C300 - 3 : 1

Cartridge Material All parts steel. All operating PILOT PRESSURE WITH
1450 100 100 BAR LOAD
parts hardened steel. E2C300

E2A300
Operating Temp. -40°C to +93.3°C (Nitrile) 0
LPM 100 200 300 400
Range/Seals (-40°F to +200°F) 0
GPM 26.4 52.8 79.3 105.7
-31.7°C to +121.1°C (Fluorocarbon) Flow (Q)
(-25°F to +250°F)
Pressure Drop vs Flow
Fluid Mineral-based or synthetic with PSI Bar Hydraulic Oil 150 SSU @ 100°F (32 cSt)
Compatibility/ lubricating properties at viscosities 290 20
Viscosity of 45 to 2000 SSU (6 to 420 cSt)
PressurDrop Bar, PSI

218 15
Filtration ISO Code 16/13, PILOTED OPEN
SAE Class 4 or better 1 to 2
145 10

Approx. Weight 1.44 kg (3.17 lbs.) FREE FLOW

2 to 1
73 5
Cavity 3K
(See BC Section for more details) 0
LPM 100 200 300 400
0
GPM 26.4 52.8 79.3 105.7
Flow (Q)

Parker Hannifin Corporation

Hydraulic Cartridge Systems
Catalog HY15-3502/US Load Control Valve
Technical Information Series E2A300, E2C300

Dimensions Millimeters (Inches)

74
(2.91)

64
(2.52) 10 AF Hex Socket (4)
30 Nm
22 lb ft torque

13 5 AF Hex socket
(0.51)
max 17 AF Hex
12 Nm
23 9 lb ft torque
(0.91)
22
(0.87)

(3)

(2)
95
(3.74)

(1)

Ordering Information

E2 300 MK2
Load Pilot Adjustment Cracking Seals
Control Ratio Style Pressure
Valve

Code Pilot Ratio Code Cracking Pressure Order Bodies Separately

A 8:1 Omit for no setting (Standard)*
C 3:1 Specify setting if required LB10
*Standard valve is set to crack at 215 Bar
(3120 PSI). Valve to be set to 1.3 times Line Body Porting Body
Code Adjustment Style / Kit No. maximum load induced pressure. Material
Z Screw Adjust
T Tamper Resistant (TC1125) Code Seals / Kit No. Code Porting
N Nitrile, Buna-N (Std.) / 089 1-1/4″ BSP (main)
(SK30022N-1) 1/4″ BSP (aux)
V Fluorocarbon /
(SK30022V-1) Code Body Material
A Aluminum
S Steel

Parker Hannifin Corporation

Hydraulic Cartridge Systems