If you are having hassles maintaining constant pressure when calibrating devices then look no further than the Ralston QT series of quick connect fittings and hoses. Leaks, tube swell and thermal expansion and contraction all play a part in making a technicians life hard when trying to stabilise a pressure in order to calibrate a device.
The QT series are developed for calibration in mind. Hoses are made to handle presures up to 6900 psi (45 MPa) and connectors feature O-ring seals throughout allowing bubble tight connections without any tools or wrenches. A variety of adapters to suit popular makes of industrial fittings such as Swagelok, Gyrolock, Tylock and others are available as well as the bleed ports of popular instrument pressure transmitters such as Honeywell, Rosemount and Yokogawa. The hoses and fittings are made to be non-swell and reduce expansion and contraction associated with temperature changes.