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{"title":"R983032418 2FRM6B36-2X\/25QRV-IN001 Rexroth German made hydraulic lock speed","imgUrl":"https:\/\/img.chinax.com\/nimg\/e4\/10\/2250866c7c5fec24ee39927f8b85-200x200-1\/r983032418_2frm6b36_2x_2f25qrv_in001_rexroth_german_made_hydraulic_lock_speed.jpg","attrs":{"Minimum Order Quantity":"1","Packaging Details":"wooden box","Max. Adjustable Flow":"25 L\/min\u200b (Q range typically 0.8\u201325 L\/min)","Payment Terms":"Western Union,T\/T,D\/P,D\/A,L\/C"}}
{"title":"R901411433 4WRPEH10C4B100L-3X\/M\/24A1 German Rexroth hydraulic proportional valve","imgUrl":"https:\/\/img.chinax.com\/nimg\/68\/a4\/8c3461bc6f9bc81e09e96d98f2fa-200x200-1\/r901411433_4wrpeh10c4b100l_3x_2fm_2f24a1_german_rexroth_hydraulic_proportional_valve.jpg","attrs":{"Minimum Order Quantity":"1","Supply Ability":"100","Packaging Details":"wooden box","Ambient Temperature\u200b":"-20\u00b0C to +60\u00b0C"}}
Q1: Is this a hydraulic lock / pilot-operated check valve?
No. A hydraulic lock / pilot-operated check valve is Rexroth type SV (cartridge) or SL (sandwich dual pilot check). The 2FRM6 is a pressure-compensated flow control / speed control valve — it meters flow in one direction (A→B) and allows free return (B→A). It does not hold/lock a cylinder.
Q2: Is this a simple throttle / needle valve?
No. A needle valve lets flow vary with ΔP. The 2FRM is pressure-compensated — the built-in compensator spool keeps the set flow essentially constant despite load or supply pressure changes (provided ≥~15 bar ΔP across compensator).
Q3: What does "B36 /25QRV" mean?
B36 = NG6 sandwich, rotary knurled knob with scale (0-max reference) + locking setscrew — adjustable by hand
/25 = maximum adjustable flow = 25 L/min (higher-capacity NG6 version; also available: /1.5, /3, /6, /10, /16, /32)
Q = flow controlled in A→B direction
R = free reverse flow B→A via check valve
V = NBR seals (standard)
Q4: How do I set the flow?
Loosen the lock setscrew, 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. Retighten the lock setscrew after setting.
Q5: 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.
Q6: 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.
Q7: 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.
Q8: 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
No flow / very low at max knob: valve installed backwards, or compensator/spool jammed
Cannot reach set flow / unstable: partially clogged orifice, cold-start high viscosity — flush system
Excessive heat: normal for flow controls — P_drop × Q = heat; ensure supply pressure isn't unnecessarily high above load requirement
Q9: Need an actual hydraulic lock (pilot-operated check / overcenter)?
You need Rexroth SV … (cartridge pilot check) or SL … (sandwich dual pilot check) — not the 2FRM series. Let me know if you need that part number.
Q10: 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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
