Hydraulic type 2FRM6 Flow Control Valve / Z4S6 Rectifier Plate 32
L/min 315 Bar size 6
Features
– For subplates see catalogue
– External closing of the pressure compensator, optional
– Check valve, optional
– Rotary knob with scale, optional lockable
Function and configurations
Flow control valve of type 2FRM is a two-way flow control valve,
used for maintaining a constant flow and is independent of pressure
and temperature. It consists of housing(1), knob rotary(2),
orifice(3), pressure compensator(4), optional check valve(9).
Flow control valve 2FRM6B~L3X/~M
Flow from A to B is throttled at throttle channel (5). Throttle
cross-section is varied by turning the knob rotary(2). To avoid
effects of pressure at port B on constant flow, a compensator (4)
is fitted. Spring (6) separately compress the compensator (4) and
orifice (3) tightly. Spring (6) compresses the compensator (4)
tightly to maintain it open when no fluid flows through the valve.
Once the fluid flows across the valve, the pressure in port A
applies a force to pressure compensator (4) through the orifice
(7).The pressure compensator (4) moves into the compensating
position until the force is balanced. If the pressure in port A
rises, the compensator (4) moves to its closing direction until
force is balanced again. Due to the compensator (4) continuous
action, a constant flow is obtained.
2FRM6A~L3X/~R
The function of this valve is basically the same as that of valve
type 2FRM6B~L3X/~R. However, pressure compensator (4) of this type
of valve is connected with port P(11) so that pressure
compensator(4) can be closed by external pressure. Any pressure in
port P through the orifice (10) can make the compensator (4) closed
against the force of compression spring (6) .When the directional
valve (12) acts, fluid flows from P to B, control is achieved as
type 2FRM6B. This flow controls the valve with the external
pressure compensator which can be closed. It only works by
controlling the inlet flow.
Symbols
Specification
· For flow control valve
· For rectifier plate
Technical data
· Flow control valve
| Max. operating pressure at port A | bar | 315 |
| Pressure differential ΔP for free return flow B to A | See characteristic curves |
| Minimum pressure differential | bar | 6 to 14 |
| Pressure stability up to P= 315 bar | % | ±2(Qmax) |
| Flow -rate | Qmax | L/min | 0.2 | 0.6 | 1.5 | 3 | 6 | 10 | 16 | 25 | 32 |
| Qmin to 100bar | mL/min | 15 | 15 | 15 | 15 | 25 | 50 | 70 | 100 | 250 |
| Qmin to 315bar | 25 | 25 | 25 | 25 | 25 | 50 | 70 | 100 | 250 |
| Fluid | Mineral oil suit, Phosphoric acid ester |
| Fluid temperature range | ℃ | – 20 to + 80 |
| Viscosity range | mm2/s | 10 to 800 |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS
1638 or 20/18/15, ISO4406 |
| Installation position | Optional |
| Circumstances temperature range | ℃ | -20 to +50 |
| Weight | 2FRM6A…2FRM6B… | kg | Approx.1.3 |
| 2FRM6SB… | kg | Approx.1.5 |
· Rectifier
| Nominal flow | bar | 320 |
| Maximum operating pressure | bar | To 210 |
| Cracking pressure | bar | 0.7 |
| Weight | kg | Approx.0.9 |
Unit dimensions (Dimensions in mm)
Type 2FRM6A...and 2FRM6B
1 Lockable rotary knob with scale (adjustment element "3")
2 Name plate
3 Inlet "A"
4 Outlet "B"
5 O-rings 9.25×1.78 for ports A, B, P and T
6 Space required to remove key
7 Hole Ø 3 for version 2FRM6B is not drilled. (without external
connection)
8 Rotary knob with scale (adjustment element "7")
9 Position of marking at port P, A, T or B
Valve fixing screws: Without rectifier GB/T 70.1-M5×30-10.9,
internal hexagon screw, tightening torque MA =8.9 Nm. With
rectifier GB/T 70.1-M5×70-10.9, internal hexagon screw, tightening
torque MA =8.9 Nm must be ordered separately.
Sub-plates: Type G 341/01 (G 1/4) Type G 342 /01 (G 3/8) Type G
502/01 (G1/2)
Type 2FRM6SB
1 Lockable rotary knob with scale (adjustment element "3")
2 Name plate
3 Inlet a
4 Outlet "B"
5 Connection thread G 3/8 to ISO 228/1
6 Space required to remove key
7 Rotary knob with scale (adjustment element "7")
8 Position of marking opposite to the nameplate
