A right angle relief valve body for high pressure fluid is provided with a bushing type valve seat in the inlet port.Hydraulic control valves A piston valve having rod guide end portions is longitudinally slideable in the valve body toward and away from the inlet port. A sleeve extension of one rod end portion,Reducing Valves having longitudinal wall slots intermediate its ends and slidable in the valve seat, closes the inlet port in a first fluid monitoring position and opens the valve fluid passageway when in a second position in response to a predetermined value of fluid pressure acting on a pressure relief member opposite the inlet port.SAFETY VALVES A high fluid pressure valve body is centrally bored and counterbored from each end and provided with a lateral bore communicating with the counter bore for forming a fluid passageway through the body between inlet and outlet ports. A valve seat is interposed in the inlet port which slideably receives a sleeve end member of a piston valve slideably supported for longitudinal movement toward and away from the inlet port.
A fluid pressure release member is secured to the valve body opposite its inlet port for releasing the valve to open in response to fluid pressure above a predetermined value allowing the excess fluid pressure to be released through the outlet port. The principal object of this invention is to provide a high fluid pressure relief valve for releasing fluid pressure downstream when above a predetermined value in which the valve open components are constructed in a manner to provide a relatively long useful life when compared with other high pressure valves and valve seats.

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