Table of Contents
Advertisement
SERviCE maNual
APPENDIX C
Nomenclature regulator performance
1
st
stage regulator performance
The nomenclature to describe the regulator is as far as possible in accordance with EN ISO 2503:1998.
Rated maximum inlet pressure, p1
Rated maximum inlet pressure for which the pressure regulator is designed
•
p1 = 300 bar(4351psi)
Rated (maximum) outlet pressure, p2
Rated (maximum) downstream pressure for the standards discharge specified (Q1). Figure taken at p1.
•
p2 = > 7.5 bar(109psi)
Lower test pressure, p3
•
p3 = 20 bar(290psi)
Stabilized outlet pressure, p4@p1
Stabilzed oulet pressure after flow (Q1) ceases, often referred to as Interstage pressure or Intermediate pressure. Figure is
taken at p1.
•
Unadjustable : 8bar < p4@p1 < 11bar (116psi < p4@p1 < 160psi)
•
Adjustable: 8.4bar<p4@p1<8.6bar (122psi < p4@p1 < 125psi)
Stabilized outlet pressure, p4@p3
Stabilzed oulet pressure after flow (Q1) ceases, often referred to as Interstage pressure or Intermediate pressure. Figure is
taken at p3.
•
Unadjustable : 8bar < p4@p1 < 11bar (116psi < p4@p1 < 160psi)
•
Adjustable: 8.4bar<p4@p1<8.6bar (122psi < p4@p1 < 125psi)
Outlet pressure p5
Highest or lowest value of the outlet pressure (see figure) during a test where the inlet pressure varies from p1 to p3 for a flow
equal to the standard discharge Q1. p5 is taken at 20-50 bar (290 - 725 psi)
•
p5 = > 7.5 bar
Irregularity coefficient (balance), i
The coefficient i is defined by:
•
i = P4@p1 – p4@p3
•
i = +/- 1.1 bar (+/-16psi)
Coefficient of pressure increase upon closure, R
The coefficient R is defined by:
•
R = p4 – p2
•
R = max 1 bar(max 15psi)
Standard discharge Q1
Corresponds approximately to a very light breath from the second stage.
•
Q1=2 L/min (0.07 ft
Leakage
Leakages above 12ml/h is regarded as a leak. Judgement shall be made after 1 minute of settling time, where after a p4
increase greater than 0.01 bar/min is regarded a leakage.
This magnitude of leakage corresponds to an IP increase of 10 bars in 16 hours in a standard Xstream regulator w/ 70cm hose
(27.5")
- xSTREam
/min).
3
aPPENDix C
45
Hide quick links:
Advertisement
Table of Contents
