Resin drum pumps

一、Common media for resin drum pumps

1. Mainstream Synthetic Resin Media (Most Commonly Used)

* Epoxy Resins: Liquid epoxy, epoxy diluent, epoxy curing agent, two-component epoxy adhesive

* Unsaturated Polyester Resins: General-purpose UPR, vinyl ester resin (styrene-containing system)

* Polyurethane Resins: Polyether polyol, isocyanate (black and white), PU adhesive, elastomer resin

* Acrylic and Alkyd Resins: Thermoplastic acrylic, waterborne acrylic, alkyd resin, modified acrylic

* Phenolic and Amino Resins: Liquid phenolic, urea-formaldehyde resin, melamine resin

* Other Commonly Used Resins: Silicone resin, unsaturated resin, modified resin, emulsion resin, UV resin

2. Resin-Matching Auxiliary Media (Often Shared with Resins in Pumps)

* Styrene, toluene, xylene, acetone, methyl ethyl ketone, ethyl acetate, etc. (solvents/diluents)

* Curing agents, accelerators, coupling agents, color pastes, filler slurries

* Aqueous solutions and dispersions of waterborne resin systems

3. Key Selection Tips (Directly Affects Pump Usability)

* Resins containing styrene/organic solvents → Flammable and explosive materials require explosion-proof drum pumps.

High-viscosity resins (paste/thick) → Select screw/high-viscosity drum pumps.

Strongly corrosive/acidic resins → Select pump tubing made of PVDF, PTFE, or 316L.

Easily curing resins → The pump body must be cleaned immediately after use to prevent seizure.

II. drum pump suitable for extracting resin

1. Determine the motor/power type based on whether it is flammable or explosive:

(1) Solvent-containing, flammable resins (unsaturated polyester, styrene system, solvent-based epoxy)

Requires: Explosion-proof drum pump

Electric: Ex d II BT4/CT4 explosion-proof motor

Pneumatic motor drum pump (naturally explosion-proof, safer)

Strictly prohibited: Ordinary motor, non-explosion-proof speed-regulating pump

(2) Water-based resins, solvent-free epoxy, acrylic emulsion

Usable: Ordinary electric drum pump

No risk of explosion-proof areas, low cost, easy to operate

2. Determine the pump structure based on viscosity:

(1) Low viscosity resins (water-based epoxy, diluent, acrylic, UPR)

Suitable for: Centrifugal drum pump

Large flow rate, fast speed, low cost

(2) Medium to high viscosity resins (epoxy A glue, polyurethane, alkyd resin)

Suitable for: Flexible screw drum pump / high viscosity piston pump

Strong self-priming, does not shear materials, can pump viscous fluids

(3) Extremely high viscosity / Paste-like resins (thick-film epoxy, PU black material, adhesives)

Suitable for: high-viscosity screw pumps, plunger-type drum pumps, booster-type drum pumps

3. Determine pump pipe material based on corrosivity

(1). Weakly corrosive / neutral resins (ordinary epoxy, water-based resins)

Material: PP, PVC

(2). Moderately corrosive, solvent-resistant resins (vinyl ester, acidic phenolic, styrene-containing systems)

Material: PVDF (preferred), 316L stainless steel, PTFE

(3). Strongly corrosive + high-temperature conditions

Material: PTFE lining, Hastelloy and other special materials

4. Determine structure and usage requirements based on ease of curing

Easy-to-cure resins (polyurethane, two-component epoxy, phenolic)

Suitable for:

Simple-structure, easy-to-clean drum pumps

Screw pumps / Piston pumps are superior to centrifugal pumps.

Key requirement: Clean immediately after use to prevent pump seizure.

5. Quick selection guideline (easy to use on-site):

Flammable: Check for explosion-proof design

Viscosity: Check for structure

Corrosive: Check for material

Easy to cure: Check for easy cleaning.

III. Core Principles for Resin Drum Pump Selection

1. First Principle: Safety First

Any medium containing volatile solvents such as styrene, toluene, xylene, acetone, or esters, or with a low flash point, is considered flammable and explosive.

Explosion-proof tank pumps must be selected:

Electric: Ex d II BT4/CT4 explosion-proof motor

Pneumatic tank pump (naturally explosion-proof, highly recommended)

Strictly Prohibited: Ordinary motors and non-explosion-proof variable speed pumps for flammable resins.

2. Second Criterion: Viscosity Determines Structure

Low viscosity resins (epoxy thinner, unsaturated polyester, water-based resins)

→ Select centrifugal drum pump

Medium-high viscosity resins (epoxy A glue, polyurethane, alkyd)

→ Select screw drum pump, high viscosity flexible pump

High viscosity/paste/thixotropic resins (PU black material, thick paste glue)

→ Select high viscosity screw pump, plunger pump

3. Third Criterion: Corrosivity Determines Material

Neutral/Weakly corrosive: PP, PVC

Strongly corrosive/Solvent resistant: PVDF, 316L, PTFE

Seals: Prefer fluororubber FKM, perfluoroether, solvent resistant and anti-aging.

4. Fourth Criterion: Anti-curing and Anti-clogging

Easy-to-cure resins (epoxy, PU, phenolic):

Select easy-to-clean structure

Clean immediately after use; prevent material residue from curing and seizing.

Resins containing fillers or powder:

Select large-channel, dead-angle-free pump body

Prevent small impeller centrifugal pumps from being jammed by particles.

5. Fifth Principle: Compliance and Matching with Operating Conditions

Complies with workshop explosion-proof zone ratings and safety regulations

Compatible with: 200L chemical drums, IBC containers

Temperature, pressure, and flow rate meet process requirements

Anti-static and grounding measures are in place