Paint Drum Pumps

Product Manual：

Paint Can Pump Introduction：

Screw-type barrel pump is the company developed a barrel pump products with domestic advanced level, using a screw-type stator extrusion design, HP-HV series screw-type barrel pump is designed and manufactured for pumping high-viscosity materials from drums and square cabinets, and its screw is designed to pump high-viscosity substances in a continuous and smooth out of the liquid at the same time on the nature of the product has almost no harmful effects, specialised in extracting high-viscosity epoxy resins, glycerin, honey, printing ink, fruit juice, gear oil, grease, paint, tomato pulp, shampoo and other high-viscosity products. The product procurement modular design, has a simple structure, easy maintenance characteristics; output liquid pressure is high, the flow rate is smooth and no pulse, conveying abrasive particles when the wear and tear is small; using conventional voltage 220V/380 power supply, convenient to connect the power operation anywhere. It is the most ideal choice for extracting high viscosity materials in the current market.

Features of Paint Bucket Pumps：

1、Screw stator rotor design, smooth material conveying, no pulsation, stable flow.

2、No lubricating oil filling in the part of contacting material.

3、Maximum viscosity up to 100,000 CPS (centipoise).

Technical Specifications Table：

Working Principle：

1. Core Mechanism: “Formation – Movement – Discharge” of the Sealed Chamber

(1) Chamber Formation (Suction)

The rotor rotates eccentrically within the stator, causing the meshing surfaces to continuously separate and form a vacuum-sealed chamber at the suction end.

High-viscosity media within the barrel (e.g., resins, inks, lubricants) are drawn into the chamber under the combined force of atmospheric pressure and the pump's suction.

(2) Chamber Movement (Conveyance)

Continuous rotor rotation drives the sealed chamber to move axially at a constant speed toward the discharge end.

With constant chamber volume, the medium experiences no backflow or pulsation, ensuring smooth conveyance.

Each rotation creates multiple consecutive chambers, enabling continuous feeding.

(3) Chamber Discharge (Extrusion)

Upon reaching the discharge end, the meshing surfaces close, reducing volume and forcibly expelling the medium.

Flow rate is proportional to rotational speed, allowing precise volume control via speed adjustment.

Reversing rotation achieves reverse pumping/barrel back-sucking.

2. Principle Advantages (Key to High-Viscosity Compatibility)

Strong Self-Priming: Vacuum effect in sealed chambers enables suction of ultra-high viscosity media (10⁵–10⁶ mPa·s).

Pulse-Free: Constant volume and continuous displacement suit precise metering/filling.

Low Shear: Gentle rotation preserves medium structure (e.g., slurries, colloids).

Particle Tolerance: Elastic interaction between stator and rotor minimizes wear from minor solid particles.

Core Structural Design：

1. Pump Head Core (Stator-Rotor Assembly, Most Critical)

Rotor (Screw)

Structure: Single-head external helical metal rod (primarily 316 stainless steel), precision-polished surface with wear-resistant treatment.

Function: Performs planetary eccentric rotation within the stator, directly propelling the medium.

Stator (Bushings)

Structure: Double-ended internal helical elastic chamber (fluorocarbon rubber / NBR / PTFE, etc.), externally enclosed by a metal pump housing for fixation.

Interaction: Interlocks with the rotor via interference fit, forming continuous, independent sealing chambers.

Lead: Stator lead = 2× rotor lead, ensuring continuous cavity displacement.

2. Transmission and Connection System

Universal Joint Coupling (Critical)

Connects drive shaft to rotor, compensating for eccentric motion while transmitting torque.

Common types: Ball cage / Pin shaft, suitable for high-viscosity, heavy-duty applications.

Drive Shaft / Pump Rod

Long shaft extends directly into the barrel, connecting to motor/pneumatic motor at top and universal joint at bottom.

Bearings and Seals

Thrust Bearing: Balances axial forces, suitable for high-pressure conveyance.

Shaft Seal: Mechanical seal/packing seal prevents leakage and accommodates corrosive media.

3. Pump Body and Inlet/Outlet

Pump Housing (Pump Tube)

Material: 316 stainless steel, modular design for easy disassembly and cleaning, suitable for food/chemical applications.

Flow Path: Streamlined design reduces flow resistance for high-viscosity media.

Suction Port / Discharge Port

Suction Port: Bottom of drum, equipped with filter screen to prevent particle damage to stator/rotor.

Discharge Port: Side-mounted / Top-mounted, equipped with quick-connect fittings / hoses for convenient material transfer.

4. Power Unit (External)

Electric Motor: 220V/380V, stepless speed regulation with overheat protection, suitable for varying viscosities and flow rates.

Pneumatic Motor: Dedicated for explosion-proof environments (e.g., solvents, flammable liquids).

Daily Maintenance：

1. Pre-startup Inspection (Mandatory Each Time)

Ensure the medium matches the pump type.

Do not pump highly corrosive, large-particle, or easily solidifying media (exceeding the stator material's tolerance range).

Medium temperature and viscosity must be within the nameplate's permissible range.

Pump Head and Piping Inspection

Suction pipe and fittings must be secure with no air leaks (air leaks cause loss of volume).

Stator and rotor show no dry grinding or significant scratches.

Power and Transmission Inspection

Motor/pneumatic motor is securely fastened with no abnormal noises.

Coupling and drive shaft exhibit no noticeable wobbling or unusual sounds.

No Dry Running

High-viscosity screw pumps must never run dry without medium, as this severely risks stator burnout.

2. Operational Monitoring (Critical)

Listen for Sounds

Normal: Smooth, low-pitched, and uniform.

Abnormal: Screeching, knocking, whistling → Shut down immediately.

Observe Flow and Pressure

Sudden drop in flow or no discharge: Typically caused by air leaks, stator wear, or solidified medium clogging the pump.

Abnormally high pressure: Outlet blockage, bent piping, or excessively viscous medium.

Check Temperature

Pump head, motor, and bearing areas should not be hot to the touch.

Overheating often indicates: dry running, material jamming, overload, stator aging.

Check for Leaks

No dripping at shaft seals or connections.

Address minor seepage promptly to prevent dust/air ingress.

3. Mandatory Post-Shutdown Procedures (Key to Extending Lifespan)

Immediate Cleaning (Critical for High-Viscosity Media)

For resin, adhesive, ink, slurry, and other curable media:

After shutdown, circulate the corresponding solvent/cleaning solution until clear liquid flows out.

Never allow media to solidify inside the pump head, as this will immediately destroy the stator and rotor.

Drain residual liquid

Empty residual material from containers. Drain media from the pump head and piping as completely as possible.

Prevent freezing at low temperatures and crusting at high temperatures.

Simple Maintenance

Wipe down pump body and motor to maintain cleanliness.

Inspect power cables and air hoses for damage or crushing.

4. Regular Maintenance (Weekly / Monthly / Quarterly)

Weekly

Check coupling and drive shaft lubrication and wear.

Inspect inlet/outlet hoses and fittings for aging or cracking.

Monthly

Disassemble and inspect pump head: Check rotor surface finish, stator elasticity, and wear.

Clean the filter screen to prevent contaminants from entering the pump chamber.

Quarterly / Semi-annually

Replace bearing grease.

Inspect motor insulation and pneumatic motor vane/cylinder wear.

Thoroughly clean the pump interior and replace aged seals.

5. Quick Troubleshooting for Common Faults (Essential Maintenance Knowledge)

No Discharge: Air leak at suction, stator wear, medium solidification, pump head blockage.

Insufficient Flow: Stator wear, insufficient speed, excessive medium viscosity, air leakage.

Abnormal Noise / Vibration: Rotor eccentricity, damaged coupling, foreign object ingress.

Leakage: Worn shaft seal, loose connections, cracked stator.

Pump Head Overheating: Dry running, outlet blockage, overload operation.

6. Maintenance Red Lines (Absolutely Prohibited)

Prohibited: Dry running without water/medium.

Prohibited: Scraping the stator with wire brushes or hard objects.

Prohibited: Forced operation under over-temperature, over-viscosity, or over-pressure conditions.

Prohibited: Failing to clean the pump after shutdown when handling easily solidifying media.