Starting from July 2025, we will launch new WN misting products. The old series will discontinued after they are sold out. Thank you for your understanding.

 
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Grease-Free Sprayers

Engineered and manufactured in Taiwan by WULI Pump—a global OEM/ODM leader in high-pressure plunger pumps—the WULI Grease-Free Power Sprayers Series delivers flow rates from 1.8 to 65.2 GPM (7–247 L/min) across the WL-520, WL-530, WL-550, WL-5120, and flagship WL-3000F. Featuring a 100% grease-free seal structure, this series completely eliminates chemical oil contamination, making it essential for certified organic farming, greenhouse crop protection, and food-grade washdowns. Selected models (WL-530 / WL-550) also feature our patented Safety Pressure Relief Valve for rock-solid pressure stability.

Grease-Free Power Sprayers: Next-Gen Agricultural & Industrial Pumps

  • 100% Grease-Free Design: Eliminates routine grease replenishment. Zero risk of grease contamination in spraying media, fully compliant with organic farming and food-grade sanitation standards.
  • Patented Safety Pressure Relief Valve (WL-530 / WL-550): Employs hydraulic pressure differential technology to deliver rock-solid pressure stability—ideal for complex multi-nozzle setups and high-demand delivery lines.
  • Advanced Water-Cooled Seals & Low Friction: Features proprietary seal structures combined with fluid self-cooling, reducing mechanical drag, minimizing seal wear, and maximizing energy efficiency.
  • Versatile Range & Cost-Effective Water Transfer Options: Covers high flow rates from 1.8 to 65.2 GPM (7–247 L/min). For long-distance water transfer or fluid delivery, WL-550, WL-5120, and WL-3000F offer budget-friendly "Dedicated Water Transfer" models without safety valves.

WULI Classic Series vs. WULI Grease-Free Series

WULI offers two high-performance plunger pump lineups to meet diverse operational needs—our proven Classic Series for traditional reliability and the next-generation Grease-Free Series for zero-contamination operations:

FeatureWULI Classic Series
(Traditional Grease-Lubricated)		WULI Grease-Free Series
(Next-Gen Advanced Seals)
Primary Applications General agricultural crop protection, orchard spraying, and standard pressure washing. Certified organic farming, greenhouse crop protection, and food-grade washdown systems.
Lubrication & Maintenance Standard maintenance required (periodic grease cup refills & adjustment). 100% Grease-Free design. Zero grease maintenance, reducing downtime and labor costs.
Fluid Cleanliness Standard commercial fluid handling. Zero grease contamination risk in spraying media. Highly eco-friendly.

Selection Guide: How to Choose the Right Model

Select the ideal Grease-Free Sprayer based on your required Flow Rate (GPM / L/min) and Operational Features:

Step 1: Select Series by Flow Rate Demand

  • Compact / Precision Spraying (1.8–4.8 GPM / 7–18 L/min): WL-520 Series — Ideal for greenhouses, orchards, and light-duty washing.
  • Medium / General Agriculture (4.2–10 GPM / 16–38 L/min): WL-530 Series — Equipped with patented safety valve; top choice for crop protection contractors.
  • Mid-to-Large / High Efficiency (7.6–15.3 GPM / 29–58 L/min): WL-550 Series — Options include patented safety valve for high-pressure spraying or dedicated water transfer models.
  • Large-Scale / Industrial Grade (20.6–48.1 GPM / 78–182 L/min): WL-5120 Series — High output for multi-nozzle spraying systems and large-volume water transfer.
  • Heavy-Duty Flagship (37.2–65.2 GPM / 141–247 L/min): WL-3000F — Maximum flow and pressure for commercial agriculture and bulk liquid transfer (Ceramic Plungers standard).

Step 2: Choose Configuration & Valve Type

  • Plunger Material: Choose Stainless Steel Plungers (cost-effective) or C-Series Ceramic Plungers (extreme abrasion resistance for heavy duty).
  • Pressure Control Options:
    • Standard / Patented Safety Relief Valve: Maintains consistent pressure for continuous high-pressure spraying.
    • AS Series Automatic Pressure Unloader: Drops line pressure to zero when spray gun is closed, preventing hose bursts and saving energy.
    • Dedicated Water Transfer Model (WL-550 / 5120 / 3000F): Simplified design without relief valves, optimized for high-flow long-distance liquid delivery at a competitive price point.
SeriesFlow RateMax PressureAvailable ConfigsKey Applications
WL-520 Series 1.8–4.8 GPM
(7–18 L/min)		 280–710 PSI
(20–50 bar)		 SS / Ceramic / AS Unloader Greenhouse spraying, small orchards, light washdown.
WL-530 Series 4.2–10.0 GPM
(16–38 L/min)		 280–710 PSI
(20–50 bar)		 SS / Ceramic / AS Unloader Medium field crop protection (patented safety valve), general pressure washing.
WL-550 Series 7.6–15.3 GPM
(29–58 L/min)		 280–710 PSI
(20–50 bar)		 SS / Ceramic / AS / Water Transfer Large orchards & tea plantations, long-distance liquid transport.
WL-5120 Series 20.6–48.1 GPM
(78–182 L/min)		 280–710 PSI
(20–50 bar)		 SS / Ceramic / AS / Water Transfer Industrial-scale spraying, multi-line crop boom systems, high-flow transfer.
WL-3000F 37.2–65.2 GPM
(141–247 L/min)		 280–710 PSI
(20–50 bar)		 Ceramic Plungers Standard / Water Transfer Flagship heavy-duty pump for massive agricultural acreage & industrial fluid transfer.

Frequently Asked Questions (FAQ)

Q: What are the main benefits of WULI grease-free power sprayers? WULI grease-free power sprayers eliminate manual grease replenishment and prevent chemical contamination in spraying fluids, making them ideal for certified organic farming, greenhouse crop protection, and food-grade washing operations.
Q: How do I select the right WULI power sprayer for commercial agriculture? Selection depends on your required flow rate: Choose the WL-520 Series (up to 4.8 GPM) for greenhouses, WL-530 / WL-550 Series (up to 15.3 GPM) for medium-to-large crop spraying, and WL-5120 or WL-3000F (up to 65.2 GPM) for industrial multi-nozzle boom spraying and bulk liquid delivery.
Q: What is the difference between standard spraying models and Water Transfer models? Standard spraying models incorporate pressure relief valves or automatic unloaders for precise nozzle spraying control. Water Transfer models (available on WL-550, WL-5120, and WL-3000F) feature a streamlined design without safety valves, optimized for high-volume, long-distance liquid conveyance at a highly competitive price point.