# Symbols of different types of Pressure Relief Valves

**URL:** <https://forumautomation.com/t/symbols-of-different-types-of-pressure-relief-valves/1289>\
**Category:** Valves\
**Tags:** prv\
**Created:** [August 28, 2016, 4:26pm UTC](https://forumautomation.com/t/symbols-of-different-types-of-pressure-relief-valves/1289 "2016-08-28T16:26:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [August 28, 2016, 4:26pm UTC](https://forumautomation.com/t/symbols-of-different-types-of-pressure-relief-valves/1289/1 "2016-08-28T16:26:38Z")

</div>

Symbols of Pressure Relief valve used in different Instrumentation diagram.

1.Pilot operated, balanced piston relief valve

\<img src=“[//forum-automation-uploads.sfo3.digitaloceanspaces.com/original/1X/e893ee219a40415e9daf192cfd94db39105db986.JPG](https://cdn.forumautomation.com/original/1X/e893ee219a40415e9daf192cfd94db39105db986.JPG)” width=“200” height="200"valt=“Pilot operated, balanced piston relief valve”\>

2.Direct-acting relief valve

![Direct-acting relief valve](https://cdn.forumautomation.com/original/1X/09df96d32b17cab0c25f3284ba888f04dc3423f4.JPG)

3.Non-adjustable direct-acting relief valve

 ![Non-adjustable direct-acting relief valve](https://cdn.forumautomation.com/original/1X/26d85000d8a20888c723bd9a5b93c3cfbbe1dc44.JPG)

4.Direct-acting relief valve, CE marked

![Direct-acting relief valve, CE marked](https://cdn.forumautomation.com/original/1X/449654bde4cca99d2c7fc7622942fa4cb6120018.JPG)

5.Fast-acting, pilot operated, balanced piston relief valve

![Fast-acting, pilot operated, balanced piston relief valve](https://cdn.forumautomation.com/original/1X/b2fd100366e9e3a4f28c4e28301ca66f76ee1f0e.JPG)

6.Pilot operated, balanced poppet relief valve

![Pilot operated, balanced poppet relief valve](https://cdn.forumautomation.com/original/1X/12262dc505afd6a68522cb6aed471b71205f4ff0.JPG)

7.Anti Shock, pilot operated, balanced poppet relief valve

![Anti Shock, pilot operated, balanced poppet relief valve](https://cdn.forumautomation.com/original/1X/a29270e4cbe0c28c05481b8c9dea1db834e01a1d.JPG)

8.Direct-acting relief valve - pilot capacity

![Direct-acting relief valve - pilot capacity](https://cdn.forumautomation.com/original/1X/b7c813541f960b458deb71aa453dd4dca2014cfb.JPG)

9.Kick-down, pilot operated, balanced piston relief valve

![Kick-down, pilot operated, balanced piston relief valve](https://cdn.forumautomation.com/original/1X/8ff127b5b004ed541504686e704977833e205f47.JPG)

10.Air-controlled, pilot operated, balanced piston relief valve

 ![Air-controlled, pilot operated, balanced piston relief valve](https://cdn.forumautomation.com/original/1X/c34830fbd16ea9ac269f9877be067d9766576e9c.JPG)