S-CLP/XL Lift Action Chemical Pump

Frequently Asked Questions: S-CLP/XL Lift Action Chemical Pump

What is the S-CLP/XL lift action pump designed for?

The S-CLP/XL is a full-length self-priming chemical drum pump designed specifically for 205 litre (55 gallon) drums. It uses a vertical piston mechanism with nylon body, stainless steel plunger rod and PTFE seal to safely transfer solvents, thinners, acetone, DEF, urea, antifreeze, mild acids and petroleum-based media. The extended suction tube reaches the bottom of full-size industrial drums, and the 400 ml per stroke output makes it practical for high-volume chemical dispensing in warehouses and production facilities.

What is the flow rate of the S-CLP/XL?

The S-CLP/XL delivers 400 ml (14 oz.) of liquid per stroke. This is more than double the output of the smaller S-CLP (190 ml per stroke) and exceeds many competing 55 gallon drum pumps. A full 205 litre drum empties in approximately 513 strokes. For partial transfers, each stroke equals a measured 400 ml, allowing operators to count strokes for precise volume dispensing.

How do I install the S-CLP/XL on a 55 gallon drum?

Thread the 2" polypropylene bung adaptor into the drum's bung opening by hand until snug. No tools, clamps or additional fittings are required. The PP adaptor creates a leak-proof seal against the drum lip. The extended nylon suction tube drops to the drum floor automatically. Once installed, begin pumping immediately; the self-priming mechanism draws fluid from the first stroke without any manual priming step.

What chemicals are compatible with the S-CLP/XL?

The S-CLP/XL handles lacquer, thinners, acetone, antifreeze, brake cleaner, detergents, glycerine, water, weed killer, mild acids, urea, DEF and petroleum-based media. The nylon, stainless steel and PTFE wetted components resist attack from most solvents and mild acids. Fluids NOT compatible include concentrated sulphuric acid, nitric acid, bleach (sodium hypochlorite), gasoline and strong caustic solutions (concentrated sodium hydroxide), which can degrade nylon over extended exposure.

Is the S-CLP/XL self-priming on a full-height 205 litre drum?

Yes, the S-CLP/XL self-primes even with the extended suction tube length required for 205 litre drums. The larger piston diameter creates sufficient vacuum to draw liquid up the full tube height on the first few strokes. No manual priming, mouth-siphoning or tube pre-filling is needed. This is essential for chemical safety: operators never contact hazardous fluids during the priming process.

Can I use the S-CLP/XL for DEF and AdBlue from a 55 gallon drum?

The S-CLP/XL is an excellent choice for dispensing DEF (diesel exhaust fluid) and AdBlue from 205 litre drums. DEF is a water-based urea solution that causes crystallisation and corrosion in metal pump components. The S-CLP/XL's nylon body and PTFE seal are completely immune to urea crystallisation. Fleet depots and truck stops that purchase DEF in 205 litre drums use this pump for daily dispensing into vehicle tanks.

Is a nylon drum pump safe for flammable liquids?

The S-CLP/XL is compatible with many flammable liquids (thinners, acetone, lacquer, petroleum solvents) from a chemical resistance standpoint. However, it does not include a flame arrestor or anti-static grounding. For environments requiring explosion-proof equipment (classified hazardous areas), additional safety measures such as grounding straps and flame arrestors may be required by local regulations. The pump itself generates no sparks or ignition sources since it has no electrical components.

What size drums does the S-CLP/XL fit?

The S-CLP/XL is designed for 205 litre (55 gallon) drums with a standard 2" (51 mm) bung opening. The extended suction tube length is matched to the internal height of a standard 205 litre drum. It also fits 200 litre and 220 litre drums with 2" bung openings. For smaller 25 litre containers, use the S-CLP with its shorter tube and 190 ml per stroke output.

How do I fix decreased flow rate on the S-CLP/XL?

Decreased flow rate usually indicates air ingress, a worn PTFE seal, or partial blockage in the suction tube. Check that the bung adaptor is threaded tightly with no air gaps. Inspect the PTFE piston seal for wear or chemical damage and replace if necessary. Remove the suction tube and check for crystallised residue or debris blocking flow. If the pump has been used with fluids that leave residue (lacquer, glycerine), flush with appropriate solvent to clear the passages.

Why is my drum pump not priming on a full drum?

If the S-CLP/XL fails to prime on a full drum, the most likely cause is an air leak at the bung adaptor or a damaged PTFE seal. Confirm the 2" PP adaptor is threaded fully into the bung opening with no cross-threading. Check the PTFE seal for cuts, chemical erosion or deformation. Verify the suction tube is not cracked (hairline cracks allow air ingress that breaks the vacuum). If all components are intact, pump rapidly 10-15 times to overcome initial air resistance in the extended tube.

Can I leave the pump installed in the drum between uses?

Yes, you can leave the S-CLP/XL installed in the drum for extended periods if the chemical is within the recommended compatibility range. The nylon, stainless steel and PTFE components resist continuous immersion in compatible fluids. However, cap the discharge spout to prevent evaporation and vapour release. For chemicals that crystallise when exposed to air (DEF, urea), keeping the pump installed and capped prevents crystallisation in the discharge path.

How do I clean the S-CLP/XL when switching chemicals?

Remove the pump from the drum and place the suction tube in a container of clean water or appropriate flushing solvent. Pump 15-20 strokes to purge residual chemical from the chamber, tube and discharge path. For sticky or viscous residues, disassemble the pump and wipe the piston, seal and tube interior with a clean cloth soaked in solvent. Allow all components to dry completely before reassembly if switching to a water-sensitive chemical. Dedicated colour-coded pumps (one per chemical) eliminate the need for cleaning between uses.

How should I store the S-CLP/XL long-term?

For storage beyond 30 days, remove the pump from the drum, flush thoroughly with clean water, dry all components and store in a cool, dry location away from direct sunlight. UV exposure degrades nylon over extended periods. Store the pump vertically with the discharge spout pointing up to prevent residual dripping. If the PTFE seal has been in continuous chemical contact for more than 12 months, inspect it before returning to service and replace if any deformation or hardening is visible.

What safety precautions apply when using a chemical drum pump?

Wear appropriate PPE for the chemical being transferred: chemical-resistant gloves, safety glasses and, for volatile solvents, respiratory protection. Ensure adequate ventilation when pumping solvents, thinners or lacquer that release vapours. Keep the drum stable on a flat surface to prevent tipping during pumping. Never overfill receiving containers. Wipe any spills immediately. For flammable chemicals, ensure no ignition sources are present in the work area. The S-CLP/XL's manual operation eliminates electrical ignition risk, but static discharge precautions may still apply for highly volatile fluids.