Flow Control Valves

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Two Way Flow Control, Rotary Adjustment Knob, 2FRM Panel Subplate Mounting Valve

2 Way Flow Control Valve

PRODUCT TYPE: 2 Way Flow Control Valve
VALVE SIZE: 5 or 6 Series
CONTROL METHOD: Throttle Flow Control
APPLICATION Hydraulic Machines
CONNECTION TYPE: Subplate Connection
CONTROL METHOD: Hydraulic
PART NOS.: FT-2FRM Series
APPROXIMATE WEIGHT: 1.6Kgs/3.82Lbs (Valve); 0.6Kgs/1.32Lbs (Rectifier)
RELATED PARTS:
FEATURE: 
– Standard oil porting for installation
– Pressure compensator controls flow strictly
– Sandwich subplate rectifier is available for optional

Z2FS Flow Control Valve PDF

Why 2 Way Flow Control Valve Needed?

The opening throttle flow of normal flow control valve is mostly affected by its difference of loading pressure (Its outlet pressure) under certain flow condition due to its poor rigidity characteristics. This normal flow control valve is hard to maintain the steady movement speed of hydraulic actuator, therefore, this kind of throttle valve is only used for the working condition where requires less variation of load and stable operation speed. But it is much difficult to avoid the changes of loading pressure, in order to improve the performance of hydraulic speed system, the pressure compensate to throttle valve is usually necessary, that is to take a method keeping steady pressure on the inlet and out ports of throttle control valve while there is a different pressure on the load. The flow rate of normal throttle valve depends on its opening size between bore and needle pin.

 The 2 way flow control valve of 2FRM series is the combination of pressure difference reducing valve and throttle valve in parallel connection. The 2FRM two way flow control valve applies for the principle: the changes of flow rates leads to different oil pressure in pipeline, which will be able to keep the pressure through the negative feedback of valve poppet to automatically adjust the difference pressure in the throttle section.

2-Way-Flow-Control-Valve-2FRM-inner-structure
– Main Parts Of 2FRM Two Way Flow Control Valve –
1. Rotary knob | 2. Valve Housing  |  3. Bush  | 4. Pressue Reducing port  |  5. Orifice | 6. Compensator  |  7. Spring  |  8. Throttling bore  |  9. Throttling poppet

How the 2FRM 2 Way Flow Control Valve Works?

2FRM two way flow control valve is actually designed for maintaining a continual flow rate but independent of hydraulic pressure and oil temperature. The main parts of the 2FRM are valve housing(2), hand operation knob(1), orifice throttling bush(3), pressure compensator(6).The movement of fluid flow from A oil port to B port is limited at the throttling spot(8). The rotary knob(1) is be able to adjust the throttling section.

Keeping the constant flow in B line, there is a pressure compensator (6) is needed to install in the down steam of the throttle spot, which is independent of the hydraulic pressure. The pressure spring presses the compensator(6) and throttle poppet

The pressure compensator in an opening position when is no oil flow through the flow control valve and the compression spring presses the pressure compensator then. When the pressure rises, the pressure compensator moves in the closing direction until approaching the force balance again. Because of the continuous compensation of pressure compensation effect, therefore, the constant flow of flow control valve is obtained, the 2FRM is designed for flow strictly limited as per this theory.

Any Accessories?

The Z4S 6 rectifier subplate is option for controlling the flow in two directions, it is installed below the 2FRM two way flow control valve. The rectifier subplate is as optional part of 2FRM, it should be specified in the order.

Valve Ordering Code

Example (Normal code): “FT-2FRM5-30 /0.6Q ”
Explanation As Below:

FT- 2FRM 5 30 / 0.6Q
(1) (2) (3) (4) (5) (6) (7) (8) (9)

(1) Producer code= FT
(2) 2FRM= 2 Way Flow Control Valve
(3) Oil Port Size= 5mm
(4) Valve series
(5) Flow Adjustment Range (A→B):
    0.2Q= 0.2L/min
    0.6Q= 0.6L/min
    1.2Q= 1.2L/min
    3Q= 3.0L/min
    6Q= 6.0L/min
    10Q= 10L/min
    15Q= 15L/min

(6) No code= Without pressure compensator
  B= With pressure compensator
(7) No code = NBR seals for petroleum oil
  V = FPM seals for phosphate ester
(8) No code= Rotary knob and scale
  K= Rotary knob with key and scale
(9) No code= Without Z4S5 rectifier subplate
  Z4S5= With Z4S5 rectifier subplate

Valve Technical Information

Main Raw Materials: Casting Iron
Power: By hydraulic
Brand: Finotek or OEM
Min. Pressure Drop: Q0.2 ~ Q6.0 -> 3~5bar ; Q10 ~ Q14 -> 6~8bar
Max. Operation Pressure: 21Mpa
Flow Rate: Please see the table below:

Constant Pressure: Q0.2 ~ Q6.0 -> ±2% ; Q10 ~ Q14 -> ±4%
Media Temperature: -30 to +80(°C)for NBR O-rings
Oil Medium: Mineral oil as per DIN51 524, VDMA 24 568 or rapeseed oil, Viscosity 10 – 400 CST
Recommended Medium Filtration: ISO 4406 Standard, cleanliness class:20/18/15

Size

5

Max. flow (L/min)

0.2

0.6

1.2

3

6

10

15

Reverse free flow (BA)
through check valve P (bar)

0.5

0.5

0.6

0.9

1.8

3.6

6.7

Rectifier technical data

Operating pressure (bar)

210

Cracking pressure (bar)

70


2FRM Flow Control Curve:

2-Way-Flow-Control-Valve-2FRM-Curve

Valve Function Symbol

2-Way-Flow-Control-Valve-2FRM-symbol

Valve Installation Dimensions

2-Way-Flow-Control-Valve-2FRM-installation-dimension

Model

A

A1

A2

A3

A4

D

D1

E

E1

E2

E3

E4

2FRM5

60

48

35

13

6

4-M5

2-φ5

60

48

41

7

6

2FRM5 – 2 Way Flow Control Valve With Key

2FRM-two-way-flow-control-valve-with-Lockable-rotary-2FRM                                                                                                                                                                                                                                         

– 2FRM With Lockable Key –
1. Rotary knob with Key(Any position lockable in scale) | 2. Valve nameplate  |
3. Pressure compensator  |  4. A inlet port  |  5. B inlet port  |  6. O-ring 12×2.5
2-Way-Flow-Control-Valve-2FRM-installation-dimension-with-Lockable-rotary

2FRM5 – 2 Way Flow Control Valve Rectifier Subplate

2FRM5 – 2 Way Flow Control Valve Rectifier Subplate            – 2FRM Rectifier Subplate –
1. 2FRM – 2Way flow control valve | 2. Rectifier subplate  | 3. Valve subplate  |
4. A Inlet port  |  5. B Inlet port  |  6. O-ring 12×2.5  |  7. Bolts:M5x80DIN912-10.9class

Z4S5-rectifier-dimensions

2017-03-05T01:46:40+00:00

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