CVG
Control Valve Group
Catalog FI-EN104-B
November 2007
Parker Hannifin Oy
Lokomec Tampere, Finland
Catalogue FI-EN104-A
CVG Control Valve Group FEATURES Proportional control valve group CVG with sandwich plate design.
Accurate control of high flows up to 1200 l/min.
Two nominal sizes available: CVG 0 and CVG50.
CVG 0 and CVG50 ctions can be joint in one block.
Very compact design.
Load nsing.
Load pressure compensated.
Clod loop version with spool position control LVDT available.
Separately adjustable pressures in A and B ports.
Main pressure relief valve available.
Hydraulic and electro-hydraulic controls.
Excellent linearity and repeatability, low hysteresis.
Every valve group factory tested and adjusted.
World wide Parker rvice.
DESCRIPTION CVG valve group can be ud to control wide range of different machines like
cranes, large mobile vehicles, lifting equipment, drilling equipment and stationary
applications. High flows can be accurately controlled with low pressure drop and
low hysteresis. CVG is a proportional load nsing valve group with sandwich
plate design. Control ctions are available in two nominal sizes: CVG 0 and
CVG50, and with different spools. CVG 0 and CVG50 ctions can be joined in
one block. Each main spool is load pressure compensated to keep speed con-
stant independent on load. Maximum flow can be adjusted parately for each
ction. Electrically open and clod loop versions are available. Clod loop
version has improved linearity and repeatability and extremely low hysteresis.
Maximum pressures in ports A and B are parately adjustable in each ction.
Inlet ctions are available with or without main pressure relief valve. Control
signal can be either hydraulic or electric or both signals can be ud parallel.
OPERATION
Speed and direction of movements are proportionally controlled by spring cen-
tered main spools. Pilot pressure moves the main spool against spring force. In
electric version pilot pressure is adjusted by electro-proportional -way pressure
reduction valves. In hydraulic version pilot pressure is adjusted by external control
valve. Pilot oil flow to electro-proportional pilot valves is arranged either inter-
nally or externally. Internal signal is taken from port P through pressure reduction
valve in the inlet ction. External pilot pressure source is connected to port PP .
Pressure difference over each main spool is kept constant by 2-way pressure
compensators. Flow (and speed of actuator) with certain opening of the main
spool is constant independent on load variations. Pressure compensators are
equipped with adjustable springs (version P2). In the version P2 the spring force
is steplessly adjustable. Spring force of the pressure compensator ts also a
limit for maximum speed of each actuator. Maximum pressures in ports A and
B are adjusted parately by pilot valves (6). The valves are piloting the pres-
sure compensator cartridge. When pressure in port A or B exceeds tting of
the pilot valve the pressure compensator starts to operate like pressure reduc-
tion valve. CVG is a load nsing valve group. Every main spool is equipped with
LS signal channels. The highest load pressure in system is always connected to
LS port. This signal can be ud to control variable load nsing pump. In open
loop valve version (F0) position of the main spool follows electric control signal
coming from amplifier card. In clod loop valve version (F1) position of main
spool is measured by LVDT. Position signal is nt to amplifier card that compares
position signal to command signal and corrects the control signal to solenoids
accordingly. Spool position (and flow) is accurately controlled. Influences of fric-
tion and flow forces are compensated and linearity, repeatability and hysteresis
of the valve are improved.Technical information
4
Parker Hanni?n Oy Lokomec Tampere, Finland Catalogue FI-EN104-A CVG Control Valve Group CHARACTERISTICS Design h c i w d n a s h t i w p u o r g e v l a v l o r t n o C n
g i s e d e t a l p Mounting positions Optional
Ambient temperature range - 30 °C … + 50 °C
Operating pressure (P, A, B, LS)350 bar
External pilot pressure (PP) (optional)
45 bar Permissible tank line (T) pressure 30 bar
Permissible drain line (DR)pressure 10 bar
Nominal ?ow (with 5 bar pressure drop over CVG30:500 l/min / ction one control edge of the spool)
CVG50:800 l/min / ction Maximum ?ow/control ction
CVG30:750 l/min / ction CVG50:1200 l/min / ction Maximum ?ow/main pressure relief valve
NS30 inlet ction:800 l/min n i m /l 0021:n o i t c e s t e l n i 05S N Solenoids
56P I ,D E %001,A m 057–0,V 42Spool position control (optional)
LVDT Ampli?er card Parker amplifier programs.(ask for parate data sheets)
Consult your contact in Parker Hannifin Hydraulic remote control signal
0 - 35 bar Step respon time Fluid
Mineral oil according to 52515N I D d n a 42515N I D Fluid temperature range
- 20 °C … + 70 °C Contamination level Max. permissible contamination level according to NAS 1638 Class 8(Class 9for 15 Micron and smaller)or ISO 19/17/14
Weight CVG30- inlet ction P30-122 kg - inlet ction P30-222 kg - control ction 40 kg - outlet ction T3022 kg - outlet ction T3116 kg CVG50- inlet ction P50-160 kg - inlet ction P50-260 kg - control ction 84 kg - outlet ction T5055 kg - outlet ction T5133 kg Adapter plate (to connect CVG30 and CVG50)
39 kg Surface treatment 2-component epoxy primer
Technical information
CVG30: 300ms CVG30 high responce:110ms CVG50:800ms CVG50 high responce:280ms
5Parker Hannifin Oy
Lokomec Tampere, Finland Catalogue FI-EN104-A
CVG Control Valve Group Code of valve group
CVG 51 Code of inlet ction
P5011A N 1Code of control ction 1
S50818C1P2F1A N 1720A 50B 00Code of adapter
A5 0A N Code of control ction 3
S 0815C2P2F1A N 1400A 50B200Code of control ction 4
S 081 C2P2F1A N 2 00A 00B 00Code of control ction 5
S 0811C P2F1A N 280A250B100
Code of outlet ction T 0A N ORDERING FORM OF COMPLETE VALVE GROUP
Example:
ORDERING CODE OF COMPLETE VALVE GROUP
X = X pcs size 0 ctions (omit if no size 0 ctions)
Note, that the maximum number of spool ctions is 5 pcs/size. If more ctions required, plea contact supplier.P50 INLET SECTION
S50 CONTROL SECTION A53 ADAPTER
S30 CONTROL SECTIONS T30 OUTLET SECTION
EXAMPLE
Ordering code
