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제품 상세 정보:
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| 표준: | ISO 7368 | 실: | 7/8" - 14 UN |
|---|---|---|---|
| 사이즈 코드: | 16 | 변형: | LC16DB20D7X/ |
| 부품 번호: | R900912546 |
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Parameter |
Description / Value |
|---|---|
|
Manufacturer & Model |
Rexroth, Series LC/LCx (Plug-in Cartridge) |
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Part Number |
R900912546 |
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Variant |
LC16DB20D7X/ |
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Function |
Pilot-Operated Check Valve (Logic Element) |
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Valve Type |
Screw-in, plug-in cartridge valve (2-way, poppet type) |
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Size Code |
16 (NG6 size cavity) |
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Cavity Standard |
ISO 7368 (Standard cavity for size 16) |
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Thread |
7/8" - 14 UN (typical for Size 16) |
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Configuration |
2-port (A, B) poppet-type logic cartridge. Acts as a pilot-operated check valve. Allows free flow from A→B, blocks flow from B→A unless pilot pressure is applied. |
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Pilot Control |
Internal or external pilot for opening. D7X code indicates a specific pilot ratio and control option. |
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Pilot Ratio |
Defined by "D7X" code. Common ratios are 3:1, 4:1, or 7:1. The exact ratio for D7X must be confirmed via datasheet. |
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Max. Operating Pressure |
Up to 350 bar (depends on cavity and system) |
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Max. Flow Rate |
High (dependent on pressure drop). For Size 16, can exceed 200 L/min. Consult Cv or flow curves. |
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Leakage (Blocked) |
Virtually zero (poppet design) |
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Seals |
Typically standard Buna-N (NBR) or FKM, depending on order code. The suffix (after the slash) is empty in this part number; standard seals are implied. |
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Fluid Compatibility |
Mineral-based hydraulic oils (HL, HLP) to ISO 11158. |
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Operating Temperature |
-20°C to +80°C (with standard seals) |
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Cracking Pressure |
Very low, typically < 1 bar for free flow direction (A→B). |
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Application |
Used as a hydraulic "lock" or load-holding valve. Prevents actuator movement (e.g., cylinder drift) by blocking flow from B→A. Can be opened by applying pilot pressure to allow controlled movement. Essential for safety in presses, lifts, and any system with suspended loads. |
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Cavity Requirement |
Must be installed in a correctly machined ISO 7368 Size 16 cavity (e.g., LC..-16). The cavity design is critical for function and pressure rating. |
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Standards |
ISO 7368 (Cavity dimensions) |
| R900921428 LC25A00E7X/V |
| R900924388 LC25B40E7X/V |
| R900925274 LC32A05E7X/V |
| R900925950 LC16A05D7X/V |
| R900926306 LC40B00E7X |
| R900926717 LC25A40D7X/V |
| R900927010 LC32B05D7X/V |
| R900927012 LC32B05E7X/V |
| R900927154 LC16DB30A7X |
| R900927969 LC40DB40E7X |
| R900927973 LC40A40E7X |
| R900928456 LC16A05E7X/V |
| R900928559 LC25A40E7X/V |
| R900928560 LC25DB40E7X/V |
| R900928566 LC32B40E7X/V |
| R900928821 LC40DB20D7X |
| R900928823 LC50B40E7X |
| R900928826 LC63A20E7X |
| R900929152 LC25DB00E7X/V |
| R900929153 LC32A00E7X/V |
| R900929381 LC25B00E7X/V |
| R900929382 LC25A10E7X/V |
| R900929665 LC50B20E7X |
| R900929795 LC80A40E6X/V |
| R900929926 LC32A40E7X/V |
| R900929929 LC32A20E7X/V |
| R900929931 LC32DB40E7X/V |
| R900929935 LC50A40E7X |
| R900929940 LC63B40E7X |
| R900930441 LC16A20D7X/V |
| R900930559 LC16DB80D7X/V |
| R900931262 LC16A40D7X/V |
| R900931361 LC16A10E7X/V |
| R900932074 LC16DB20E7X/V |
| R900932338 LC32DB00D7X |
| R900932339 LC32DB00E7X |
| R900933141 LC25DB80E7X |
| R900933193 LC25A00D7X/V |
Q1: What is the primary function of this component?
A: This is a pilot-operated check valve (often called a "logic cartridge" or "load-holding valve"). Its core functions are:
Free Flow in One Direction: It allows hydraulic fluid to flow freely from port A to port B (like a standard check valve).
Positive Blocking in the Opposite Direction: It completely blocks flow from port B to port A with near-zero leakage, effectively "locking" an actuator (like a cylinder) in place, even under high load.
Pilot-Controlled Opening: The block from B→A can be overcome by applying an external pilot pressure signal, which opens the valve and allows controlled flow in the reverse direction.
Q2: How is it different from a simple throttle or standard check valve?
A: Unlike a throttle valve for speed control or a simple spring-loaded check valve, this is a poppet-type, pilot-operated cartridge designed for load-holding and safety. It provides a bubble-tight seal to prevent load drift, a critical safety feature that standard valves cannot guarantee. Its opening is controlled by a separate pilot pressure line, not just by flow direction.
Q3: What do the codes in "LC16DB20D7X/" mean?
A: This is a detailed product identifier:
LC: Product series for screw-in cartridge logic elements.
16: The size, corresponding to an NG6 cavity (e.g., 7/8"-14 UN thread).
DB20: Indicates the specific poppet and sleeve configuration (dimensions, flow path).
D7X: The most critical code, defining the pilot control configuration. "D" typically refers to a specific pilot piston area ratio (e.g., 3:1, 4:1, 7:1), and "7X" defines the control and damping options. Consulting the datasheet for the exact meaning of D7X is essential.
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