Abstract: A proportioning valve is provided for volumetric proportioning of flow in an influent fluid line of the valve between two effluent fluid lines of the valve, particularly adapted for use in sensing main flow and adjusting purge flow in proportion to main flow in a twin-tank heatless or heat-reactivated adsorbent bed gas-fractionating apparatus, such as a desiccant bed dryer. The valve features two valve elements, each movable independently of the other, one sensing and responding to flow through one variable opening, and the other responding to and cooperating with the first in adjusting flow through a second variable opening, the first variable opening being in the influent fluid line of the valve, and the second variable opening being in one effluent fluid line of the valve, the first and second valve elements in combination controlling flow in the one effluent valve line at a desired volume and pressure in relation to pressure and flow in the influent valve line.

Abstract: A spin-on type coalescer filter unit comprises a siphon tube which extends from inside the bottom of the filter element canister along the center line of the element, through the attachment nipple of the filter unit head, and into a fitting designed to receive the tube end. The fitting connects the tube to an oil drain passage so that coalesced oil may be driven through the siphon tube and to a drain line by high pressure in the filter canister.