Technical Brief

Modeling Pop Action Pressure Relief Valve as a Bistable Element

[+] Author and Article Information
Lili Xie

School of Automation,
Northwestern Polytechnical University,
Changan Campus,
Mailbox 898,
Xi’an 710129, China
e-mail: xielili@nwpu.edu.cn

Xinhua Zheng

School of Automation,
Northwestern Polytechnical University,
Changan Campus,
Mailbox 652,
Xi’an 710129, China
e-mail: parisz@163.com

Lizhuo Liu

School of Automation,
Northwestern Polytechnical University,
Changan Campus,
Mailbox 652,
Xi’an 710129, China
e-mail: lizhuoliu@126.com

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received April 5, 2014; final manuscript received January 19, 2015; published online February 24, 2015. Assoc. Editor: Allen C. Smith.

J. Pressure Vessel Technol 137(5), 054501 (Oct 01, 2015) (6 pages) Paper No: PVT-14-1059; doi: 10.1115/1.4029654 History: Received April 05, 2014; Revised January 19, 2015; Online February 24, 2015

To overcome the shortcomings of traditional method for modeling pop action pressure relief valves (PAPRVs), a new method for modeling PAPRVs as a bistable element is proposed. The effects of the model’s main parameters on a valve’s behavior are simulated and analyzed. Through simulations, the atypical behaviors of PAPRV previously found by other researchers do arise and can be explained based on the simulation data. Then, according to this new method, a model was built for a special pressure relief valve, and the simulation data agree well with the experimental results. These results demonstrate the validity of the modeling method.

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Fig. 1

Typical static characteristics of a bistable valve

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Fig. 3

Behavior of uneven cycling and continuous venting mode arise in the simulation (The first line displays the pressure variation in the vessel, the second line shows the proportional lift of the disk, and the third line shows the proportional flow rate.)

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Fig. 4

Atypical behavior of softer pops arise in the simulation

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Fig. 2

Pressure regulating behavior of the PAPRVs with different values of n and k (The first row displays the pressure variation in the vessel. The second row is the proportional flow rate.)

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Fig. 5

Physical structure of the X312

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Fig. 6

Simulating the performance of the X312 model (a) ramp rate = 1.0 psi/s, (b) ramp rate = 3.0 psi/s, and (c) ramp rate = 5.0 psi/s



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