|
|
|
Featured
Product
 |
Valve-Squeak™
Technology Breakthrough in Leak
Detection |
|
Designed for operations and maintenance personnel to
perform frequent valve checks in their units, Valve-Squeak is an easy-to-use
through-valve loss detection system. Small enough to fit in your pocket,
Valve-Squeak isolates leaks of any size and in any valve saving you thousands,
if not millions of dollars.
FIND LOSSES BEFORE THEY GROW - Simple
Operation. A green light shows a “no leak” and a yellow LED bar graph
shows a leak range of “small” to “very large”. Once a leak
is identified, your VPAC™ unit can be used for quantification.
Valve-Squeak has high noise and vibration immunity and is Intrinsically Safe
for use in hazardous, gaseous environments that require Class I, Div 1, IIC, T4
(currently only meeting US certifications).
Mistras - Physical Acoustics Corporation Website
Other TechQuip Products |
|
|
|
|
|
|
MISTRAS
Physical Acoustics
Corporation
Acoustic Emission
Software and Products
for
Industry
Physical Acoustics Corporation - PAC - designs and
manufactures acoustic emission sensors and acoustic emission measurement
instruments under a quality program which is certified to ISO-9001 standards.
Acoustic emission research is offered at the advanced basic level, with the
company currently active on several commercial industrial and government
applied research contracts. PAC's REACT division is collaborating with
universities and industry for advancing AE sensor technology. Our acoustic
emission training and personnel certification program is respected worldwide.
Mistras Group
|
|
|
VPAC/5131 -
Loss Control for Valves in Process Plants
  VPAC™ estimates
through-valve leakage based on measurements made using a Physical Acoustics
Model 5131 portable monitor together with data on valve size, type, and
differential pressure. Developed for use in refineries, chemical plants and
offshore platforms by British PetroleumTM (B.P.), VPAC is sold under license
exclusively by Physical Acoustics Limited. This technology package is primarily
used for estimating gas losses, gas-to-gas or liquid-to-gas, but limited data
on liquid leakage is also included. The system is immune to environmental noise
by virtue of the advanced sensor technology. This ensures that measurements are
easily made on-line and does not require extensive training of
operators.
Database
 The
basis of VPAC is a database built up by British Petroleum over the past decade
that estimates leak rate from the acoustic signal level, taking into account
valve type, size, and pressure. The database was built up by removing valves
from service that had been identified as leaking by the use of the portable
monitor, and testing them under controlled conditions in the laboratory.
Several hundred measurements were made. This data is included in the package in
both numeric and graphical form, together with procedures for making site
measurements and calculating losses. Benefits
 B.P.
uses this technology in its operations and loss-control, resulting in a very
fast payback. Site experience has shown that 5-10% of valves leak, and 1-2% of
valves cause 70% of total loss. Savings in excess of $100,000 per site are
easily achieved. Where gas recovery systems are in use, monitoring product
valve leakage helps to identify and estimate the extent of the downgrading of
valuable products to fuel gas due to valve leakage. This is something
previously identified by the flare, but goes unseen with gas recovery in use.
Cost savings are achieved in maintenance planning, troubleshooting plant
operations and monitoring of losses for environmental purposes.
VPAC
Gas Leak CalculationPredictive Equation
Using their database, B.P.
developed an calculation that estimates losses from the input data. This is
provided as part of the package in a spreadsheet form, which makes use very
easy on a PC. It is particularly useful on large sites that have many hundreds
of valves. It is also provided in a graphical form for quick use out in the
plant.
.
External Link to Mistras - Physical Acoustics
Corporation Website
Other TechQuip Product
Lines
|
|
|
|
