On steam service, the syphon will prevent hot steam from entering. pressure gauge, diaphragm seal or transmitter. CRN registered. Applications: recommended for applications involving temperatures above 100 degree F. Material: schedule 80 carbon steel. Style: 180 degree coil. Connection: 1/4" NPT Male x 1/4" NPT Male. Maximum operating pressure: suitable up to 1650 psi at 630 degree F.