An isolation valve for pressure gauges and transmitters. For mild applications, this valve can be used to throttle pulsation. CRN registered. Applications: provides precision flow control for any non-corrosive application up to 400 psi (2758 kPa). Body: #59-1 forged brass. Handle: ABS plastic, dyed red. O-ring: rubber. Shaft and nut : #59-1 brass. Process temperature: -9 degree F to 212 degree F. Maximum operating pressure: 400 psi (2,758 kPa). Connection: 1/4" NPT female.