2FRE6B-2X/1LK4RV力士乐电磁阀*概述：

2FRE6B-2X/1LK4RV力士乐电磁阀*
力士乐FRE6型二通比例调速阀
2FRE6A-20B/3QRV
2FRE6A-20B/6QRV
2FRE6A-20B/25QMV
2FRE6A-20B/2QEMV
2FRE6B-20B/16QRV
2FRE6A-20B/2QERV   2FRE型调速阀是两通的流量控制阀，此阀是由减压阀和节流阀串联构成的。油流进入调速阀后，先经过减压阀减压，再由节流阀节流。由于减压阀对节流阀进行了压力补偿，所以调速阀的流量不受负载变化的影响，保持稳定。同时节流窗口设计成薄刃状，流量受温度变化很小。调速阀和单向阀并联时，油流能反向回流。
２FRM6型调速阀可外用关闭压力补偿器，可设置单向阀，用数字指示的调节旋钮，阀可以带锁，安装尺寸符合DIN24340
产品列表--力士乐系列阀
1. REXROTH溢流阀
①       DBD型直动溢流阀
②       DB/DBW型5X系列先导式溢流阀
③       DB...K型4X系列插入式先导溢流阀
④       ZDB/Z2DB6型4X系列叠加式溢流阀
⑤       ZDB/Z2DB10型4X系列叠加式溢流阀
⑥       ZDBD型叠加式溢流阀
2. REXROTH减压阀
①       DR型5X系列先导式减压阀
②       ZDR6D型叠加式减压阀
③       ZDR10D型叠加式减压阀
3. REXROTH顺序阀
①       DZ型5X系列先导式顺序阀
4. REXROTH卸荷阀
②       DA/DAW型5X系列先导式卸荷阀
5. REXROTH节流阀
③       MK/MG型节流阀/单向节流阀
④       DV/DRV型节流阀/单向节流阀
⑤       Z2FS型叠加式双单向节流阀
6. REXROTH单向阀
①       S型单向阀
②       RVP型单向阀
③       Z1S型叠加式单向阀
④       SV/SL型4X系列液控单向阀
⑤       Z2S型叠加式液控单向阀
⑥       Z2S6型6X系列叠加式液控单向阀
7. REXROTH调速阀
①       2FRM6型调速阀
8. REXROTH换向阀
②      WE6型6X系列湿式电磁换向阀
③      WE10型3X系列湿式电磁换向阀
④      WEH型电液换向阀
⑤      WMD6型手动换向阀
⑥      WMD10型手动换向阀
⑦      WH型液动换向阀
⑧      WMM型手动换向阀
⑨      WMM25、32通径手动换向阀
2FRE6B-2X/1LK4RV力士乐电磁阀*
Function, section
Proportional flow control valves of type 2FRE … feature a 2-
way function. They can control a flow, which is determined by
an electrical command value, with pressure and temperature
compensation.
They basically consist of housing （）, proportional solenoid with
inductive position transducer （2）, metering orifice （3）, pressure
compensator （4） and optional check valve （5）.
Proportional flow control valve type 2FRE 6 B-2X/.K4RV
（without external closing, with check valve）
The setting of the flow is determined by the setting （0 to 00 %）
on the command value potentiometer. The selected command
value causes metering orifice （3） to be adjusted via the amplifier
and the proportional solenoid. The inductive position transducer
senses the position of metering orifice （3）. Any deviations from
the command value are corrected by the closed-loop position
control.
Pressure compensator （4） keeps the pressure differential
across metering orifice （3） always at a constant value. This en
sures load-compensation of the flow.
The low temperature drift is a result of the favourable design of
the metering orifice.
At a command value of 0 % the metering orifice is closed.
In the event of a power failure or cable break on the inductive
position transducer, the metering orifice closes.
Starting from a 0 % command value, a jump-free start-up is
possible. The metering orifice can be opened and closed with a
delay provided by two ramps in the electrical amplifier.
Check valve （5） allows the free return flow from B to A.
The supply and return flow to and from the actuator can be con
trolled with the help of an additional rectifier sandwich plate of
type Z4S 6… under the proportional flow control valve.
Proportional flow control valve type 2FRE 6 A-2X/.K4MV
（with external closing, without check valve）
In principle, the function of this valve is the same as that of valve
type 2FRE 6 B-2X/.K4RV.
To suppress the start-up jump when metering orifice （3） is open
（command value > 0 %）, closing of pressure compensator （4）
is provided via port P （6）. There is no internal connection be
tween port A and pressure compensator （4）. The pressure in P
upstream of directional valve （8） acts on pressure compensa
tor （4） and holds it in the closed position against the force of
spring （7）. When directional valve （8） is switched from P to B,
pressure compensator （4） moves from the closed position to
the control position, thus preventing a start-up jump.