The DP27T and DP27TE are combined pressure / temperature control valves for use on steam applications. They are designed to be used in conjunction with a 2 m length of capillary which is available separately (other lengths are available on request. They combine a temperature and pressure pilot valve in one unit. This controls the main valve so that the temperature is maintained while the maximum steam pressure is limited. A variable rate conical pressure adjustment spring is fitted providing a downstream pressure range of 0.2 - 17 bar g.