|
Parameter
|
Value
|
|
Full Part Number
|
R983073459 (IN001 = individual inspection suffix)
|
|
Base Model
|
2FRM 6 - B76 - 2X / 32QRV
|
|
Valve Type
|
2-way throttle check valve with pressure compensator (flow control — constant flow despite pressure fluctuations)
|
|
Nominal Size (NG)
|
6 — sandwich mounting per ISO 6263 / NG6 (DIN 24340 Form C)
|
|
Function
|
Adjustable orifice + pressure-compensated spool → constant flow A→B; free reverse flow B→A via check valve
|
|
Adjustment Type
|
B76 = Rotary knurled knob with scale & tamper-proof lockable cap / sealable (hand-adjustable, variant of B36 with enhanced locking — same flow range)
|
|
Component Series
|
2X (series 20+, dimensionally interchangeable)
|
|
Max. Adjustable Flow
|
32 L/min (Q range typically 0.5–32 L/min — largest flow capacity for NG6 2FRM)
|
|
Max. Operating Pressure
|
315 bar (ports A & B)
|
|
Cracking Pressure (Reverse Check)
|
approx. 0.5 bar (standard free-return)
|
|
Mounting Pattern
|
NG6 sandwich (4× M5 bolts), between directional valve & subplate
|
|
Seal Material
|
NBR (standard, code V — for mineral oil HL/HLP, HFC)
|
|
Hydraulic Fluid
|
Mineral oil HL, HLP per DIN 51524; HFC (water-glycol); HLPD, HVLP, HVLPD
|
|
Fluid Temperature Range
|
-30 °C to +80 °C (NBR seals)
|
|
Viscosity Range
|
10–800 mm²/s
|
|
Weight (approx.)
|
1.28 kg
|
|
Body Material
|
Steel / cast iron, zinc-plated
|
| R900205578 2FRM6B36-3X/0,6QMV |
| R900207275 2FRM6B38-3X/0,6QRVSO23 |
| R983032407 2FRM6B36-2X/0.6QRV |
| R983032406 2FRM6B36-2X/0.6QMV-IN001 |
| R900057830 2FRM5-33/15QJ |
| R900205503 2FRM6A36-33/1.5QRV |
| R900205504 2FRM6A36-33/3QRV |
| R900205505 2FRM6A36-33/6QRV |
| R900205506 2FRM6B36-33/1.5QMV |
| R900205507 2FRM6B36-30/1.5QRV |
| R900205508 2FRM6B36-33/10QMV |
| R900205509 2FRM6B36-30/10QRV |
| R900205510 2FRM6B36-30/16QMV |
| R900205511 2FRM6B36-30/16QRV |
| R900205512 2FRM6B36-33/25QMV |
| R900205513 2FRM6B36-30/25QRV |
| R900205514 2FRM6B36-30/32QMV |
| R900205515 2FRM6B36-30/32QRV |
| R900205516 2FRM6B36-33/3QMV |
| R900205517 2FRM6B36-31/3QRV |
| R900205518 2FRM6B36-31/6QMV |
| R900205519 2FRM6B36-31/6QRV |
| R900205520 2FRM6B76-30/10QMV |
| R900205521 2FRM6B76-33/16QMV |
| R900205522 2FRM6B76-33/16QRV |
| R900205523 2FRM6B76-33/25QMV |
| R900205524 2FRM6B76-33/25QRV |
| R900205525 2FRM6B76-33/32QMV |
| R900205526 2FRM6B76-33/32QRV |
| R900205527 2FRM6B76-30/6QMV |
| R900205528 2FRM6B76-33/6QRV |
| R900205576 2FRM6A36-30/0.6QRV |
| R900205577 2FRM6B36-30/0.2QMV |
| R900205578 2FRM6B36-33/0.6QMV |
| R900205580 2FRM6B36-30/0.2QRV |
| R900208589 2FRM6A76-33/16QRV |
| R900209088 2FRM6B76-30/3QMV |
| R900209842 2FRM6A36-30/25QRV |
| R900209925 2FRM6A76-30/10QMV |
| R900209926 2FRM6A76-31/3QMV |
| R900209927 2FRM6B76-31/10QRV |
| R900210351 2FRM6A36-31/10QRV |
| R900210352 2FRM6A76-31/25QRV |
| R900210353 2FRM6A36-30/32QRV |
| R900210721 2FRM6A36-3X/3QMV |
| R900210722 2FRM6A36-3X/6QMV |
| R900210838 2FRM6B36-3X/10QJMV |
| R900210900 2FRM6B76-3X/1.5QMV |
| R900211134 2FRM6A363X/10QMV |
| R900211379 2FRM6B76-3X/1.5QRV |
Frequently Asked Questions (FAQ)
Q1: Is this a simple throttle / needle valve?
No. A simple needle valve lets flow vary with ΔP. The 2FRM is pressure-compensated — the built-in compensator spool keeps the set flow essentially constantdespite load or supply pressure changes (provided ≥~15 bar ΔP across compensator).
Q2: What does "B76 /32QRV" mean?
-
B76 = NG6 sandwich, rotary knurled knob with scale + tamper-lockable / sealable cap (hand-adjustable; same flow characteristic as B36).
-
/32 = maximum adjustable flow = 32 L/min (maximum NG6 2FRM capacity; also avail: /1.5, /3, /6, /10, /16, /25).
-
Q = flow controlled in A→B direction.
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R = free reverse flow B→A via check valve.
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V = NBR seals (standard).
Q3: How do I set the flow?
Loosen/turn the lock ring (if sealed), turn the knurled knob clockwise to increase flow, counterclockwise to decrease. The knob has a relative scale — use a flow meter to correlate to actual L/min. After setting, tighten the lock ring / apply seal wire to prevent accidental adjustment.
Q4: How is it mounted?
As a sandwich (stackable) valve between a directional control valve and the NG6 subplate, same bolt pattern as ZDR/Z2FS sandwiches (4× M5). Observe the arrow on the valve body — A→B = controlled/metered flow, B→A = free return.
Q5: Does it work both ways?
No — one direction is pressure-compensated metered flow (A→B), the opposite direction (B→A) is free return through the check valve (no flow control, minimal pressure drop ~0.5 bar). For bidirectional flow control use two 2FRM valves.
Q6: Minimum pressure requirement?
The pressure compensator typically needs min. ~15 bar differential pressure across the compensator to regulate properly. Supply pressure must exceed the highest load pressure + ~15–20 bar + line losses.
Q7: Common faults & causes?
-
Flow varies with load pressure: compensator spool stuck (contamination) — check oil filtration (ISO 4406 18/16/13 or better); or insufficient ΔP across compensator.
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No flow / very low at max knob: valve installed backwards, or compensator/spool jammed.
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Cannot reach max 32 L/min / unstable: partially clogged orifice, cold-start high viscosity — flush system.
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Excessive heat: normal for flow controls — P_drop × Q = heat; ensure supply pressure isn't unnecessarily high above load requirement.
Q8: What is the difference between B36 and B76?
Both have the same flow characteristic and knob. B76 has a tamper-evident / sealable lock cap for applications where the setting must not be altered after commissioning. B36 has a standard lock setscrew only.
Q9: Fluid & seal compatibility?
NBR seals = mineral oil (HL/HLP) & HFC (water-glycol). For HEES/HETG biodegradable oils or HFD phosphate ester → specify FKM (Viton) seal variant.
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