||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date; ga('create', 'UA-1314708-3', 'auto'); ga('require', 'GTM-M2BXSQ5'); ga('set', 'forceSSL', true); ga('set', 'anonymizeIp', true); ga('require', 'displayfeatures'); ga('require', 'cleanUrlTracker'); ga('require', 'outboundLinkTracker'); ga('require', 'ec'); ga('send', 'pageview'); ga('set', 'nonInteraction', true); setTimeout("ga('send', 'event', 'read', '20 seconds')", 20000); Lutz Pumpen | Doppelmembranpumpe 1/2" PVDF, geschraubte Ausführung)
Family business since 1954
International branch
800 8 43 39 01 (toll free)

Double diaphragm pump 1/2" made of PVDF (PTFE version) (bolted version)

Suitable for highly aggressive liquids Application examples:   Suitable for emptying...more

Suitable for highly aggressive liquids

Application examples: 
Suitable for emptying 200 l drums, ink, chemical, solvents, acids and alkalis feed and recirculation.


  • Absolutely free of oil
  • Absolutely safe to run dry
  • Self-priming, even dry
  • Centre block made of corrosion-free plastic
  • Just a few components, easily accessible
  • Flow rate up to 17.2 GPM
  • Explosion-proof version approved according to ATEX Directive 2014/34/EU, Category 2


  • No failure of the pump due to lack of lubrication
  • No contamination of the environment or of the product itself by oil vapour
  • Gentle pumping of thick-bodied, contaminated and abrasive liquids
  • No direct chemical attack of the air-conducting parts in case of membrane rupture
  • Easy maintenance without special tools


Version for drum emptying on request

Housing Material: PVDF (Polyvinylidene fluoride)
Sizes: 1/2"
Materials Double diaphragm pump 1/2” KNT PVDF/PTFE Housing: PVDF...
Materials Double diaphragm pump 1/2” KNT PVDF/PTFE
Housing: PVDF
Diaphragm: PTFE
Valve ball: PTFE
Seal: PTFE
Temperature of medium: max. 93 °C
Air inlet

1/4" NPT female
(1/2" BSP female)*

Air Exhaust 3/8" NPT female
Suction: 1/2" BSP female
Pressure joint: 1/2" BSP female
Weight:  5,4 kg
Flow rate: max. 65 l/min.
Suction lift dry: max. 3 m
Operating pressure: max. 8 bar
Solids handling: max. Ø 3.2 mm 

* if the air flow control valve is used (not included in the scope of supply)