Catalog HY15-3501/US
Parker Hannifin Corporation
Hydraulic Cartridge Systems
Check
Valves
Shuttle
Valves
Load/Motor
Controls
Flow
Controls
Pressure
Controls
Logic
Elements
Directional
Controls
Manual
Valves
Solenoid
Valves
Proportional
Valves
Coils &
Electronics
Bodies &
Cavities
Technical
Data
SH
CV
LM
FC
PC
LE
DC
MV
SV
PV
CE
BC
TD
Pilot Operated Check Valve
Series D4A020
CV27
Technical Information
Specifications
Dimensions
Millimeters (Inches)
Rated Flow 30 LPM (8 GPM)
Nominal Flow @ 16 LPM (4.2 GPM)
7 Bar (100 PSI) (Piloted Open)
Maximum Inlet 420 Bar (6000 PSI)
Pressure
Leakage at Less than 3 drops/min.
150 SSU (32 cSt)
Cracking Pressure 5 Bar (72 PSI)
Pilot Ratio 4:1
Cartridge Material Steel operating parts,
hardened steel poppet.
Operating Temp. -40°C to +93.3°C (Nitrile, Buna-N)
Range/Seals (-40°F to +200°F)
-31.7°C to +121.1°C (Fluorocarbon)
(-25°F to +250°F)
Fluid Mineral-based or synthetic with
Compatibility/ lubricating properties at viscosities
Viscosity of 45 to 2000 SSU (6 to 420 cSt)
Filtration ISO code 16/13,
SAE Class 4 or better
Approx. Weight .066 kg (.145 lbs.)
Cavity 53-1
(See BC Section for more details)
Ordering Information
Performance Curve
Pressure Drop vs. Flow (Through cartridge only)
General Description
Miniature Pilot to Open, Poppet Type Check Valve.
For additional information see Technical Tips on
pages CV1-CV4.
Features
•
Hardened poppet for maximum durability
•
Low leakage - less than 3 drops/min.
•
Sealed pilot
•
Extremely compact construction - can be fitted directly
into most cylinders
•
Cavity commonality with load control valves
•
Dual line blocks available
•
All external parts zinc plated
Code Porting
310 3/8″ BSP (Main)
1/4″ BSP (Aux.)
318 3/8″ SAE (Main)
1/4″ SAE (Aux.)
312 3/8″ BSP Dual Cavity
319 3/8″ SAE Dual Cavity
Code Seals / Kit No.
N Nitrile, Buna-N /
(SK30090N-1)
V Fluorocarbon /
(SK30090V-1)
D4A020
Check
Valve
Seals
Body
Material
Porting
Code Body Material
A Aluminum
S Steel
Line Body
LB10
Order Bodies Separately
Hydraulic Oil 150 SSU @ 100°F (32 cSt)
Flow (Q)
5
1.3
10
2.6
15
4.0
20
5.3
LPM
GPM
0
25
6.6
30
7.9
0
73
290 20
15
10
5
218
PSI Bar
145
Pressure Drop ( P)
Piloted Open
1 to 2
Free Flow
2 to 1
(1)
(2)
(3)
12.00
(0.47)
34.20
(1.35)
22 AF Hex.
40 Nm
(30 lb. ft.)
Torque
M18 x 1.5
(1)
(2)
(3)
(1)
(2)
(3)
