MA-RZMO-APS0101560 direct acting proportional relief valve
1. Body 2. Cone seat 3. Spring 4. Cone spool
1. Overview of proportional valve products
MA-RZMO is a direct - acting cone - core proportional overflow valve. The pressure of the valve is proportional to the input electrical signal. This kind of valve work principle is through the electronic amplifier to provide proportional electromagnet drive current, the proportional electromagnet produced by the thrust to push the cone valve core () in the cone valve seat () of the hole, and the oil pressure balance in the cone valve seat () hole. The regulating pressure of the valve is proportional to the input signal of the amplifier.
The valve can be equipped with a pressure sensor and a digital integrated amplifier in addition to the open-loop pressure control. Because the hysteresis and linear error of the valve are greatly reduced, it has better dynamic characteristics. This open-loop or closed-loop valve is used primarily as a pressure guide valve.
2. Selection table of proportional overflow valve:
| MA- |
RZMO |
A |
PS |
010 |
15 |
UO |
* |
|
Model
|
proportional relief valve size 6 |
A= For open loop control |
Communication interface (for rail type digital amplifier only)
PS=RS232 Serial interface
|
010=P port adjust，
T Unloading port
|
Maximum pressure range： |
UO- The input signal 0~10V |
blank= Petroleum based hydraulic fluid |
| AES= same A ，With integrated digital amplifier |
50=50bar
|
I= Input current signal 4-20mA |
| 100=100bar |
WG= Water glycol |
|
TERS= With built-in pressure sensor and integration I=Input current signal 4-20mA
Type a digital amplifier |
210=210bar |
just for -TERS type valve |
| 315=315bar |
F-The fault signal |
PE= Phosphate ester |
| |
Q= Band enable signal |
3 proportional relief valve performance data (ambient temperature - 20 ℃ ~ 60 ℃)
Hydraulic symbols:
MA-RZMO-A MA-RZMO-AES MA-RZMO-TERS
|
Max adjust pressure bar
|
50
|
100
|
210
|
315
|
100
|
210
|
315
|
|
Min adjust pressure bar
|
2
|
3
|
3.5
|
4.5
|
3
|
3.5
|
4.5
|
|
P port max pressure bar
|
315
|
|
T port max pressure bar
|
210
|
|
Max flow（ L/min ）
|
4
|
|
Min flow（ L/min ）
|
0.3
|
|
Hysteresis (% of maximum regulated pressure)
|
≤ 1.7
|
≤ 0.2
|
|
Repeat accuracy (% of maximum regulated pressure)
|
≤ 2.5
|
≤ 0.5
|
|
The response when the signal changes from 0 to 100%
Time (subject to test conditions)
|
≤ 70ms
|
≤ 55 ms
|
|
Amplifier type and plug
|
E400(see pages 119-122) E200(see pages 105-110)
|
|
Amplifier power supply
|
24VDC
|
4. VTOZ proportional valve working curve (oil temperature 45 ℃, 46 # anti-wear hydraulic oil)
4.1. Flow regulation curve
Pressure adjustment curve was measured at flow Q=1L/min. Note: the back pressure of T port will affect the pressure adjustment
1. MA - RZMO - A MA - RZMO - AES 2. MA - RZMO - TERS
This proportional valve work curve :
4.2 pressure/flow curve
Under the condition of flow Q=1L/min, make the input signal change and measure:
3. MA - RZMO - A MA - RZMO - AES 4. MA - RZMO - TERS
4.3 minimum pressure flow curve measured at "0" input signal:
5. MA - RZMO - * - 010/50 6. MA - RZMO - * - 010/100 7. MA - RZMO - * - 010/210, 8. MA - RZMO - * - 010/315
Ma-rzmo-a mounting dimensions
Installation interface size in accordance with iso4401-ab-03-4 standard, 6 diameter
Firm screws: 4 M5*50 hexagon socket, class 12.9
Oil port diameter: P,T=5.5mm (maximum)
Pressure switch
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