Jessberger Lab Pump Set JP-128 PP for Chemicals

When you need to transfer acids, alkalis or detergents from bottles, canisters or other narrow-neck containers at higher flow rates, the JP-128 builds on the JP-125 platform with a larger Ø 28 mm pump tube. The wider tube cross-section delivers up to 35 l/min — nearly double the output of the Ø 25 mm version — while maintaining the same chemical resistance, compact form and complete plug-and-play configuration.

Purpose — Higher throughput from narrow-neck containers

The JP-128 is the right choice when the JP-125 is not fast enough. Larger filling volumes, continuous dispensing at a filling station, or containers with an inner neck opening that accommodates a 28 mm tube — these are the conditions where the larger diameter translates directly into time saved per transfer. The Ø 28 mm tube fits containers with an inner opening from approximately 31 mm upward, opening up a wider range of industrial container types compared to the 25 mm version.

How it works in practice

The JP-120 motor drives a Hastelloy shaft connected to an axial impeller at the base of the pump tube. Insert the pump tube into the container until the impeller tip is below the liquid surface. The motor attaches via connection thread G 1", and the ¾" (DN 19) outlet connects to the 2 m PVC hose included in the set. The PP nozzle with ¾" connection and FKM seal allows one-handed dispensing. The Hastelloy (HC) drive shaft ensures the pump handles media that would corrode standard stainless steel — including concentrated acids and alkalis up to 50°C.

Key features

• Ø 28 mm PP pump tube — larger bore delivers up to 35 l/min for higher throughput applications
• Hastelloy (HC) drive shaft — handles highly aggressive media including concentrated acids and alkalis
• ¾" (DN 19) hose connection — matched to the larger tube output for efficient flow
• Low voltage release switch — prevents uncontrolled restart after power failure
• Thermal motor protection — extends motor life under continuous or high-viscosity loads
• 2 m PVC hose and PP nozzle included — no additional accessories required to begin operation

Certification & Approvals

• Protection class IP 24
• Double insulated, category II
• CE marked

Technical Specifications

• Motor: JP-120, 230 V, 50/60 Hz, 250 W
• Protection class: IP 24
• Drive shaft: Hastelloy 2.4610 (HC)
• Pump tube material: Polypropylene (PP)
• Pump tube outer diameter: Ø 28 mm
• Connection thread: G 1"
• Hose connection: ¾" (DN 19)
• Hose included: 2 m PVC hose ¾"
• Nozzle included: PP ¾", FKM seal
• Flow rate: Up to 35 l/min
• Head: 7 m
• Max. temperature: 50°C
• Max. viscosity: 200 mPas
• Max. density: 1.2
• Pump tube length: 700 mm / 1000 mm
• Cable length: 5 m with plug

Applications

• High-throughput transfer of acids from laboratory and industrial containers
• Dispensing alkalis and cleaning agents at filling stations
• Filling dosing equipment from wide-neck chemical containers
• Pharmacy and chemical production — medium-volume transfer
• Water treatment — transferring treatment chemicals at higher flow rates
• Agriculture — dispensing liquid fertilizers and crop protection chemicals

Operational Requirements

• The impeller must be fully submerged during operation — do not run the pump dry
• Maximum medium temperature: 50°C — do not exceed with PP tube
• Maximum viscosity: 200 mPas — for higher viscosity, consider the JP-132 series
• Container inner opening must accommodate Ø 28 mm tube (approx. 31 mm minimum)
• Not suitable for flammable liquids without ATEX-rated equipment