Selecting a Diaphragm Pump for Water-Based Wax Emulsion

Hi all,
I’m looking for a 3/4” or 1” air actuated diaphragm pump for transferring a water-based wax emulsion. The fluid has a pH of about 11 and operates at around 190°F.
Based on the chemistry and temperature, I’m assuming all wetted parts should be either PTFE or stainless steel.
Does anyone have recommendations for a suitable pump model or material configuration? Thanks in advance.

Nic wrote:Nic, you are on the right track with stainless and PTFE. At pH 11, most stainless steels (like 304 or 316) can handle alkaline solutions fairly well, but the 190°F temp is something to verify carefully in the pump specs.

Nic wrote:Hi, Nic. The pump is made of stainless steel, which is resistant to alkali, and the diaphragm is made of Teflon.
You can choose our model ATO-AODD-25 (1-inch air operated diaphragm pump). Link: https://www.ato.com/1-inch-air-operated-diaphragm-pump

Thank you for these two pieces of feedback. Sounds like stainless with PTFE internals is the right direction. I’ll review the ATO-AODD-25 specs.