20MM hand pump

The 20MM hand pump (commonly known as CS-20 marine hand pump) is a small self-priming reciprocating pump with a diameter of 20mm that relies on manual reciprocating shaking. It does not require a power supply and has a simple structure, making it suitable for pumping oil/water in non electric scenarios. It is commonly used in ships, oil depots, construction sites, and outdoor emergency situations.

1. Model and Diameter

Model: CS-20 (CS=marine hand pump, 20=inlet and outlet diameter 20mm)

Diameter: DN20 (20mm), compatible with standard 20mm hoses/fittings

Material Classification:

CS-20Y: cast iron cylinder liner, capable of pumping diesel, engine oil, clean water, etc.

CS-20H: copper alloy cylinder liner, stable performance, capable of pumping seawater and sewage

2. Core Parameters (CS-20)

Flow rate: 0.02m ³/min (1.2m ³/h)

Head/Discharge pressure: 20-25m (0.25MPa)

Self suction height: ≤ 5m (water column), no need for pump infusion

Working mode: Double acting plug mainly for clinical use, one person can operate

Weight: about 5.8kg, portable and easy to install

Medium temperature: ≤ 60 ℃

III. Structure and characteristics

Structure: Cast iron/cast copper pump body, stainless steel valve seat, long handle, inlet and outlet joints, fully mechanical without circuit

Advantages:

✅ No need for power supply: can be used anytime in the field, on board ships, or in non electric oil depots

✅ Self suction strength: absorb liquid directly within 5 meters, no need to divert water

✅ Practical and low maintenance: anti-corrosion of key components (based on actual reports), excellent sealing, and no easy leakage

✅ Compact and lightweight: can be lifted with one hand, installation only requires a fixed base

4. Applicable media and scenarios

Can be pumped: diesel, kerosene, engine oil, lubricating oil, clean water, seawater, mild sewage (no hard particles/fibers)

Prohibited: gasoline, strong acids and alkalis, liquids containing particles/fibers

Scenarios:

Ship bottom drainage, oil tank pumping

Oil tank/barrel pouring, agricultural machinery/construction site refueling

Outdoor water intake, civil defense engineering, emergency oil transportation

5. Key points of use

Connect a 20mm hose and tighten the clamp to prevent leakage. First of all, there is no need to pump, simply shake the handle to absorb liquid. Shake the handle evenly (about 50 times/minute) to avoid rapid wear. After use, drain the residual liquid, clean the filter screen, and store it dry