High impact pressure regulator used with a high impact gas scannograph withstands impacts of over 15,000 g. By the passage of fluid through the first and second chambers of the regulator, the pressure of the scannograph is regulated from a specific input valve to the desired output pressure valve

Biles, J. E., Jr.

Floyd, E. L.

Topits, A. N., Jr.

English

NASA Technical Reports Server

Uppe 
Upper Pre 
Chamb 
Upper Valve C 
Retainer 
Upper Pc 
Port To Low( 
Chamber 
Lower Val 
Housinç 
Condi
amber 
r Valve 
e Seat 
r Port 
Valve Guide 
Retainer 
er Pressure 
iamber 
ar Diaphragm 
August 1967	 Brief 67-10274 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
High Impact Pressure Regulator Withstands Impacts of Over 15,000g 
The problem: 
To develop a high impact pressure regulator capable 
of withstanding impacts of over 15,000 g. The regula-
tor, to be used with a high impact gas scannograph, 
must be capable of regulating pressures from 2000 to 
200 psig so as to maintain output pressures in a range 
of 82 to —1.2 psig. The instrument must be able to 
withstand high impact and continue to function ac-
curately for long periods of time. In the past, spring 
loaded pistons and other structures having large mass
were used. These regulators were not able to withstand 
high impact forces and could not function continu-
ously and accurately. 
The solution: 
A carefully constructed regulator, welded by helium 
arc and other special processes, that has two chambers 
which are similar in structure but which respond to 
different pressure valves. One chamber and associated 
valving structure maintains a first pressure while the 
second chamber with associated valving structure 
_.	
(continued overleaf) 
This document was prepared under the sponsorship of the National	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States 	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned rights.
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maintains a different and reduced pressure. By the 
passage of fluid through the first and second cham-
bers, the pressure of the third is regulated from a 
specific input valve to the desired output pressure 
valve. 
How it's done: 
The upper valve is biased to an open position by the 
upper diaphragm. If fluid pressure entering the upper 
chamber through the upper port is greater than the 
opposing spring force exerted by the upper dia-
phragm, the diaphragm moves to the left and the 
valve moves toward the valve seat. The diaphragm and 
valve are adjusted to hold a pressure of between 100 
and 150 psig in the upper chamber. 
Fluid pressure from the upper chamber passes 
through the lower valve into the lower pressure 
chamber. The lower valve is biased to an open posi-
tion by the lower diaphragm. If fluid pressure entering 
the lower chamber through the lower valve is greater 
than the opposing spring force of the lower dia-
phragm, the diaphragm moves to the right and the 
valve moves toward the valve seat. The diaphragm and 
valve are adjusted to hold a pressure within the lower 
chan?ber so that the discharge pressure through the 
conduit will be 80 psig.
Notes: 
1. This pressure regulator was designed to handle 
small volumes of gas flow for a gas scannograph. 
The flow rate is on the order of 50 ml per minute. 
2. The regulator successfully withstood an impact 
force on the order of 15,000 g for about 2 msec 
and continued to function properly. 
3. This regulator could be used on equipment and 
machinery subject to high vibratory and impact 
problems. 
4. Inquiries concerning this invention may be di-
rected to:
Technology Utilization Officer 
NASA Pasadena Office 
4800 Oak Grove Drive 
Pasadena, California 91103 
Reference: B67-10274 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to NASA, Code 
GP, Washington, D.C. 20546. 
Source: A. N. Topits, Jr., E. L. Floyd,
and J. E. Bites, Jr.
Jet Propulsion Laboratory 
(NPO- 10175) 
Brief 67-10274	 Category 01


High impact pressure regulator withstands impacts of over 15,000 g

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