Flojet G573215A Air Operated Diaphragm Pump Air Operated Diaphragm Pumps Air Operated Diaphragm Pump Service Station Oil Fluid Inlet/Outlet 1/2 I . Sandpiper Pumps feature an externally serviceable air distribution system and all-bolted construction. Self-priming pumps can run dry without damage and are capable of deadheading against a closed discharge, eliminating the need for bypass or pressure relief valves. Seal-less design and corrosion-resistant materials make the pumps ideal for solids handling and high-suction lift applications such as transferring antifreeze, ATF, light viscosity petroleum and synthetic-based oil and waste oils. Units designed for fuels and flammable solvents include ground capability to eliminate static discharge. Whetted parts material: Polypropylene/Buna. Rated for service of typical fluids: Antifreeze, windshield wash fluid, UL 79 listed fuels, diesel.

A good microscope is an investment in learning and adventure. An iris diaphragm is a good investment that will pay for itself over and again in many situations. If an ad you are looking at does not specify "iris" diaphragm, it probably has a disk type. The iris diaphragm is superior, and it will allow you to see things that simply cannot be seen with the disk diaphragm. Using the iris in my Observer I can easily see the internal organelles of the single-celled protozoa I find in a nearby swamp. (Oh joy!) All GreatScopes from the Observer III and up feature the preferred iris diaphragm as standard equipment. The Observer IIdf has a disk diaphragm. Cast alloy aluminum stand with an acid resistant lustrous almond finish.Nosepiece: Rear facing, triple (BR3088F) or quadruple (BR3089F) revolving, ball-bearing nosepiece with positive click stops to ensure parcentration.Objectives: DIN standard achromat, parfocal, parcenter and color-coded. All models include 4x (N.A. 0.10), 10x (N.A. 0.25) and 40x R* (N.A. 0.65). A 100x R* (N.A. 1.25) objective is also supplied with the BR3089F. *Retractable Spring MountStage: 119 mm x 119 mm with stage clips or factory installed double-plate mechanical stage with low position controls and iris diaphragm.Substage: BR3088F models offer a built-in N.A. 0.65 condenser with five aperture disc or iris diaphragm.