This document discusses four types of valves: pressure relief valves that can be directly or pilot operated, pressure reducing valves, sequence valves, and counter balance valves. It lists their functions but does not provide details about each valve type or their specific functions.

1. A presentation on
By
Saurabh Patil.
T.E. ©

2. 1. pressure relief valve
(directly operated ,pilot operated)
2. Pressure reducing valve
3. Sequence valve
4. Counter balance valve

3. Function