Beswick's miniature MSV slide sleeve valve provides an efficient in-line three-way valve. When the sleeve is moved to the “ON” position, fluid is allowed to pass through the valve. When the sleeve is moved to the “OFF” position, the outlet is exhausted to the atmosphere and fluid is prevented from exiting the inlet port. The valve can be attached directly on a device to be isolated and does not require mounting. The maximum pressure rating of the valve is 200 psig and the flow restriction through the valve is equivalent to a 0.039” – 0.042” (1.0 mm to 1.1 mm) orifice.  The valve is available with either 10-32 threads or with a barbed inlet port.