Fisher Types 627W and 627WH pressure reducing regulators are direct-operated for liquid service. They are available in NPS 3/4, 1, and 2 / DN 20, 25, and 50 body sizes and in construction materials to match liquid applications. View and Download Emerson Fisher 627 Series instruction manual online. Pressure Reducing Regulators. Fisher 627 Series Controller pdf manual download. Also for: 627, 627r, 627m, 627hm, 627h, 627mr. REGULATORS Fisher High Pressure Commercial Regulators FiShER 630 A high capacity regulator which offers reliable performance for large load commercial and industrial applications. Type 64 high pressure adjustable regulator used for high pressure burners as crop dryers or industrial burners. Suitable for liquid under 150° F. Fisher® 627 Little Joe™ and 630 Big Joe™ Regulator The 627 Series direct-operated pressure reducing regulators can be used with natural gas, air, or a variety of other gases and are offered in 3/4″, 1″, or 2″ body sizes with NPT end connections or 1 or 2 inch body sizes with ANSI Class 300RF and 600RF flanged end connections.