YLH21 Internal Gear Pump

YLH21 Internal Gear Pump

2 week ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

YLH21 Internal Gear Pump

Product Overview

YLH21 is a double‑stage fixed‑displacement internal‑mesh Hydraulic gear pump, a high‑performance hydraulic pump widely used for stable oil supply in industrial hydraulic system and various hydraulic‑driven Machine.

This compact double‑unit Hydraulic gear pump adopts axial‑radial pressure compensation structure. It delivers low‑noise, low‑pulsation flow output, and maintains high volumetric efficiency even under low‑speed operation. It is especially suitable for servo‑frequency‑conversion energy‑saving hydraulic circuits, and serves as an ideal power‑supply component for plastic machinery, pressure equipment, metallurgical machinery and other industrial Machine[(Zhejiang Y...)].

Technical Specifications

‑ Model: YLH21

‑ Product Type: Double‑stage internal‑mesh Hydraulic gear pump, pressure‑compensated hydraulic pump

‑ Displacement combination: Shaft‑end pump 25‑63 mL/r; Cover‑end pump 8‑25 mL/r, multiple displacement options available[(Zhejiang Y...)]

‑ Rated working pressure: 21 MPa; Maximum working pressure: 35 MPa

‑ Speed range: 200‑3000 r/min

‑ Mounting form: Flange‑mounted, standard mounting dimension

‑ Shaft option: Plain key shaft / SAE spline shaft

‑ Rotation direction: Clockwise / Counter‑clockwise optional

‑ Working medium: Anti‑wear hydraulic mineral oil for industrial hydraulic system

‑ Oil temperature range: ‑20℃ ~ +80℃

‑ Key Features: Double‑pump combined structure, low noise, low flow pulsation, high volumetric efficiency, wide speed range, good anti‑pollution performance, reliable for continuous operation of industrial Machine

Working Principle

YLH21 internal‑mesh Hydraulic gear pump consists of two groups of internal‑meshing gear pairs, crescent partition plate, pressure‑compensated side plates and pump housing. When the motor drives the shaft to rotate, the inner and outer gears rotate synchronously. The suction chamber volume expands to generate negative pressure, drawing hydraulic oil into the pump cavity. As gears rotate, the pressure‑side chamber volume shrinks and pushes hydraulic oil out to supply the whole hydraulic system. The built‑in axial‑radial compensation keeps high volumetric efficiency under varying pressure conditions.

Worn gear pairs, blocked oil passages or shaft‑seal failure will cause flow drop, pressure fluctuation or oil leakage of the Machine. Replacing a qualified YLH21 hydraulic pump can restore stable oil‑supply performance of your hydraulic system.

Core Advantages

1. Double‑stage combined design with two independent flow outputs, flexible to match multi‑circuit requirements of complex hydraulic system.

2. Internal‑mesh gear structure with pressure compensation, low noise and low flow pulsation, improving running stability of hydraulic‑driven Machine.

3. High volumetric efficiency, stable flow output even at low rotating speed, perfectly fit for servo‑frequency‑conversion energy‑saving applications.

4. Wide displacement combination selections, easy to match different power demands of various Machine.

5. Strong anti‑pollution capability and long service life, convenient for maintenance and replacement in existing hydraulic system.

Application Range

YLH21 double‑stage internal‑mesh Hydraulic gear pump is a key power‑supply hydraulic pump for industrial hydraulic system. It is widely applied to plastic injection machinery, leather machinery, hydraulic presses, metallurgical equipment, forklifts and other hydraulic‑driven industrial Machine. Especially popular for servo‑driven energy‑saving hydraulic circuits. Suitable for hydraulic‑system integrators, equipment manufacturers, maintenance workshops and global spare‑parts distributors

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch , hydraulic system

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