m188Description. Haskel Model M-188 0.33HP Air-Driven Liquid Pump. Catalog literature: Liquid Pump Catalog.pdf With a nominal pressure ratio of 188:1, the Haskel model M-188 0.33HP air-drivenDescription. Haskel Model M-188 0.33HP Air-Driven Liquid Pump. Catalog literature: Liquid Pump Catalog.pdf With a nominal pressure ratio of 188:1, the Haskel model M-188 0.33HP air-driven