Copied Series H3 Differential Pressure Switch
Series H3 Differential Pressure Switch
W.E. Anderson, H3A-4SL, Series H3 Explosion-Proof Differential Pressure Switch, Aluminum, 10-200 psidWeatherproofExplosion-proof, heavy duty, industrial unit has a unique new design which provides sensitivity to differential pressures. Unlike common differential pressure switches that use a piston-type motion transfer, the Series H3 utilizes a rotary motion transfer shaft that prevents a change in total pressure from causing a setpoint shift. Unit yields deadbands approximately 5% of range, with zero setpoint shift due to variation in working pressures. Friction is minimized and repeatability increased by allowing range spring to act directly on diaphragm plate. Rolling diaphragm design maintains constant effective area to further reduce friction. Diaphragm is allowed to "seat", allowing application of full rated pressure, up to 1500 psi (103 bar), on either high or low pressure port, without damage. Special over-travel feature prevents overtightening of range adjust screw. Product ApplicationsWater flow proving with an orifice plate.Differential pressure across chiller.Liquid filter status.Perfect for monitoring differential water pressure on filters, chiller coils, and flow elements.ApprovalsATEX_Approval CSA Approval UL-Motor Controllers-US.
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