The following chart provides some basic guidelines on selecting the right solution for your application. Please consult with your local CONSOLIDATED sales office or local distributor to select the best and most economical solutions for your specific pressure relief applications. Chart from page 5 of 27 of SRV brochure.

The following guidelines should be followed when making a valve selection.

Step 1: Calculate the proper valve orifice area (Ac) requirements. Refer to Valve Sizing Section of this catalog or use CONSOLIDATED SRVS.6 Computer Assisted Sizing Program. Read more

Step 2: Based on calculated orifice size, determine which pressure relief valve will meet the orifice area requirements.

Step 3: For spring loaded valves determine if back pressure limits are exceeded and if a bellows is required. If a bellows is required, you must select a 1900 flanged valve.

Step 4: For spring loaded valves check the operating pressure requirements against the valve set pressure requirements. If the operating pressure exceeds 90% of the set pressure, or if the differential is less than 25 psig, review the possibilities for need of a soft seat O-Ring. If an O-Ring seat is not acceptable, review the system and valve setting parameters to achieve proper differential pressure.

SRVS is a Windows-based sizing program for pressure relief valves that can be used with the Windows operating systems. This software is also network compatible. This sizing program may be used for the sizing and selection of consolidated spring-loaded and pilot-operated safety relief valves. Available sizing methods include single fluid, gas or liquid, sizing at 10% overpressure, multi-fluid sizing at 10% overpressure, and fire-sizing based upon required capacity, vessel dimensions, or vessel area at 21% overpressure. If necessary, multiple valves may be selected for a single application, using the 16% overpressure factor for the low set valve.   
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Yes. Included in this software are the checks for ASME Sec. VIII compliance, ASME B16.34 pressure temperature limits, API pressure and temperature limits (if applicable), O-Ring and bellows requirements, spring chart limitations, and steam chart correlations.

The CONSOLIDATED Sizing Program may be obtained through the www.dresser.com website; choose downloads.

Please follow the given guidelines. PDF link.

ValvKeep works on 5 level

Technical – where it list down vales by multiple identifications depending on the field of classification like valve type, models, etc.

Historical – recording of past and ongoing maintenance of the valves

Parts – history of parts repair and replacement

Planning and Analysis – where it takes all the above 3 levels to provide information needed in a predictive manner

VK Viewer – a companion program for ValvKeep to allow the valve end user to access report and analyze their repair information from any web browser.