HYD5550 Hydraulic Drive Kit | SXW21.35N Pump

Overview

• HYD5550 is a purpose-built hydraulic drive kit that couples a compact low-speed/high-torque (LSHT) hydraulic motor directly to the Annovi Reverberi SXW21.35N triplex plunger pump.
• Rigid, alignment-stable mounting plane delivers professional cleaning performance in a compact, belt-free package that fits trailers, service bodies, vans, and plant carts.
• The SXW21.35N water end is selected for approximately 21 L/min (≈5.5 GPM) at up to 350 bar (≈5075 PSI) near 1450 RPM, providing strong impact with smooth, controllable flow for single-gun washdown, parts rinsing, and precision cleaning.

Direct Drive, Alignment & Serviceability

• Motor and pump share the same centerline on a shared base, keeping shaft centerlines true under load and minimizing side forces on bearings and seal packs.
• Reduced side-loads mean less vibration, calmer trigger cycling, and longer component life compared to belt systems that wander with heat and retensioning.
• Service-friendly layout provides clear access to the coupling, easy-view oil sight glass, and vented dipstick.
• AR ships the pump pre-filled with oil, so pre-start checks are fast for a single technician.

Hydraulic Interface & Circuit Practices

• Displacement-matched LSHT motor (gerotor/geroler style; brand may vary) is sized to achieve target pump speed and torque at pressure.
• Typical ports: SAE-12 (3/4″ ORB) pressure and return, with auxiliary SAE-8 (1/2″ ORB) case drain when the motor build requires it.
• Observe A/B port orientation for correct rotation; route the case drain above reservoir oil level to prevent aeration.
• Size hose IDs generously and respect bend radii to avoid restriction.
• Protect the circuit with upstream reliefs set to your working pressure; specify 10–25 μm return filtration with an adequate β-rating.
• Size reservoir for heat rejection (practical rule: 2–3× total system flow), adding an oil cooler for hot climates, prolonged bypass, or continuous duty.

Water-Side Plumbing & Protection

• SXW manifold is typically ported 1/2″ F BSPP inlet and 3/8″ F BSPP discharge (adapters to NPT are readily available).
• Keep suction run short, straight, and oversize from tank; use anti-collapse suction hose to preserve volumetric efficiency and prevent cavitation.
• Add a coarse inlet strainer to protect the pump from debris.
• Use an adjustable unloader sized for the SXW duty class to maintain working pressure while bypassing safely to tank.
• Include a high-pressure relief and glycerin-filled gauge for commissioning and diagnostics.
• Install a thermal relief on the bypass loop to protect seals during extended gun-closed operation.

Quick Sizing & Integration Checks

• Motor speed (RPM) ≈ 231 × hydraulic GPM ÷ motor displacement (in³).
• Water horsepower ≈ GPM × PSI ÷ 1714 (≈ 16.3 HP at 5.5 GPM and 5075 PSI).
• Torque (lb-in) ≈ displacement (in³) × PSI ÷ 6.283 (apply realistic efficiencies).
• Match motor displacement to required pump RPM under load and verify upstream relief settings.
• Confirm reservoir volume, filtration, and cooling capacity; include a case drain if the motor manufacturer specifies it.
• Keep inlet restrictions low with short, direct suction; select nozzle orifice to hit desired flow/pressure and never overspeed the pump.
• Plan a low-pressure recirculation path for prolonged bypass and schedule periodic torque checks on head, manifold, and coupling fasteners.

Applications & Field Use

• Municipal and DOT fleets and heavy-equipment washdown.
• Plant maintenance, environmental and waste services, and building services.
• Fleet depots and rental turn-backs needing fast, consistent wash capability.
• Exterior cleaning contractors who need a compact, professional hydraulic package.
• Stainless-friendly SXW wet end plus low-RPM operation deliver quiet running, long seal life, and clean installs without belt dust.

Ownership, Warranty & Key Details

• Manufacturer & origin: Annovi Reverberi, Modena, Italy—leader in high-pressure pump quality since 1958.
• Water performance (SXW21.35N): ≈21 L/min (≈5.5 GPM) at up to 350 bar (≈5075 PSI) near 1450 RPM.
• Hydraulic motor: LSHT, displacement-matched; typical ports SAE-12 pressure/return with SAE-8 case drain (verify on selected motor).
• Pump ports: typically 1/2″ F BSPP inlet and 3/8″ F BSPP outlet; NPT adapters available.
• Includes: factory oil fill, sight glass, vented dipstick.
• Benefits: compact direct drive, alignment-stable geometry, predictable hose routing, fast single-tech PM, and a cleaner install than belt systems.
• Warranty: 5-year limited, conditional AR pump warranty—proper hydraulic and water installation, filtration, lubrication, and operation within published limits required; seals and valves are consumables.