Brief introduction of recirculating water vacuum pump:

Zhengzhou Greatwall recirculating water vacuum pump Oil-Free, portable, chemical resistant, 2-head recirculating water pump simplifies maintenance, no more frequent and costly water change. All major parts are made of PTFE, these economical vacuum pumps are perfect for tough lab applications.

• SHB-Ⅲ: shell, flume, ejector, tee junction, check valve and gas-extraction nozzle adopt the PP material; pump body and impeller(six flow passages, dual seal) adopt stainless steel plate pressing, the material is in accordance with the ANSI standard.
• SHB-ⅢA: ejector and gas-extraction nozzle adopt stainless steel material (ANSI standard), the rest is the same as SHB-Ⅲ.
• SHB-ⅢS: pump body adopts the PP material, which is more suitable for acid gas, the rest is the same as SHB-Ⅲ.
• SHB-ⅢG: spray paint Teflon(PTFE) on the ejector and gas-extraction nozzle, gas pipeline adopts fluorine rubber material.

Features of recirculating water vacuum pump:

• Long life, corrosion resistant, reliable.
• All major valves and parts made of PTFE.
• Whisper quiet operation.
• Chemically resistant.
• No water changes, no cold trap required for water/alcohol solutions.
• Virtually maintenance-free solution for laboratory environment.
• Smaller footprint than oil pump saves lab space.
• Designed to work with 500ml,1L,2L rotary evaporators.

Specifications of recirculating water vacuum pump:

Complete sets of recirculating water vacuum pump:

Recirculating chiller(DL-400) / 2L Rotary evaporator(R-1001-VN) / SHB-III