drum pump for tomato paste

Product Manual：

Introduction to high viscosity drum pumps：

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.

High viscosity drum pump features：

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).