Jessberger Lab Pump Set JP-125 PP for Chemicals

When you need to transfer acids, alkalis or detergents from bottles, canisters or other narrow-neck containers in small, controlled quantities, a standard drum pump is oversized and impractical. The JP-125 lab pump set is built for exactly this — a compact, chemical-resistant system that installs directly into a container and delivers a steady, controlled flow.

Purpose — Controlled transfer without spills

Pouring aggressive chemicals from a narrow-neck container introduces real risk: splashing, imprecise dosing, and direct contact with the medium. Without a pump, even routine transfers in a laboratory or filling station become a safety concern. The JP-125 encloses the transfer path entirely — from container to discharge point — eliminating exposure and giving the operator full control over flow via the nozzle trigger.

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. The impeller must be fully submerged in the medium to operate — insert the pump tube into the container until the impeller tip is below the liquid surface. The motor attaches to the container neck via the connection thread G 1", and the Ø 25 mm tube fits containers with an inner opening from approximately 28 mm upward. The 2 m PVC hose connects to the ½" (DN 13) outlet, and the PP nozzle allows one-handed dispensing with flow control. The Hastelloy (HC) drive shaft ensures the pump can handle media that would corrode a standard stainless steel shaft — including concentrated acids and alkalis.

Key features

• Hastelloy (HC) drive shaft — handles highly aggressive media that stainless steel cannot withstand
• PP pump tube Ø 25 mm — chemical resistance up to 50°C for acids, alkalis and detergents
• Low voltage release switch — prevents uncontrolled restart after power failure, a critical safety feature in chemical environments
• Thermal motor protection — extends motor life under continuous or high-viscosity loads
• Internally ventilated motor — active cooling without external air intake, reducing contamination risk in aggressive atmospheres
• 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 25 mm
• Connection thread: G 1"
• Hose connection: ½" (DN 13)
• Hose included: 2 m PVC hose ½"
• Nozzle included: PP ½", FKM seal
• Flow rate: Up to 20 l/min
• Head: 5 m
• Max. temperature: 50°C
• Max. viscosity: 200 mPas
• Max. density: 1.2
• Pump tube length: 500 mm / 700 mm
• Cable length: 5 m with plug

Applications

• Transferring acids from laboratory bottles and reagent canisters
• Dispensing alkalis and cleaning agents in industrial facilities
• Filling dosing equipment from narrow-neck chemical containers
• Pharmacy and chemical analysis — small-volume transfer
• Water treatment — transferring treatment chemicals
• Agriculture — dispensing liquid fertilizers from canisters

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-128 or JP-132 series
• Container inner opening must accommodate Ø 25 mm tube
• Not suitable for flammable liquids without ATEX-rated equipment