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How Tough is a Hoffer Flowmeter?
Hoffer Flow Controls is proud to announce the successful conclusion
to extensive Shock and Vibration Testing conducted on our
HO2 & 4-inch Flowmeters and our HIT- 2A Totalizers. Hoffer
Flow Controls is the only Military Shock and Vibe qualified
provider of Turbine Flowmeters in the world.
Northrup Grumman Newport News Shipbuilding performed the tests
in accordance with MIL-S-901D “Shock Tests, H.I. (High
Impact) Shipboard Machinery Equipment” and MIL-STD-167-1,
Mechanical Vibrations of Shipboard Equipment.
What is “Shock Tested?” HO Flowmeters
and Hit-2A Totalizers, while operating under 160 psig, were
subjected to tests designed to simulate an explosion in the
water as close as 20 feet from the “hull” of a
ship. The equipment was “hard mounted” to a frame
and a 400-pound hammer was dropped nine times to impact with
that frame. The Shock Test was then repeated for each side
of the equipment.
Shock Test Report No. 03005324 TEST RESULTS: “Both
the 2” and 4” Flowmeter assemblies successfully
passed the nine shock blow test with no functional degradation
or material deformation. Nothing came adrift throughout the
shock test and no potential hazard was ever observed. The
initial internal pressure of 160 psig was maintained throughout
testing, with no indication of leakage. The post-shock test
visual inspection revealed no irregularities.”
Photo provided of Shock Testing of Hoffer turbine
flowmeter and HIT-2A electronics.
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What is “Vibration Tested?”
HO Flowmeters and Hit-2A Totalizers, while operating
under 160 psig, were subjected to tests designed to
simulate mechanical vibrations originating from those
of 1) environment 2) those arising form internal excitation,
or 3) those associated with reciprocating machinery
and propulsion systems / shafting. Once again the Flowmeters
and Hit-2A’s were hard mounted on a frame and
mechanically shaken. The tests were conducted with variable
frequencies from 4 to 33 Hz. That’s 2000 cycles
per min. with duration of over 6 hours!
Vibration Test Report No.05004086 TEST RESULTS:
“Both the 2” and 4” turbine flowmeter
assemblies operated properly throughout environmental
vibration testing, indicating the proper flow rate throughout.
No functional degradation or material deformation was
observed during testing or during the post test visual
inspection. Operational testing performed at the conclusion
of all vibration testing demonstrated that the item
functioned properly.”
“Comparing the manufacturer’s pre and post-shock
test calibration data demonstrates that within reasonable
measurement error, the shock and vibe test had no detrimental
effect on the calibration of either Flowmeter.”
How Tough is a Hoffer Flowmeter? Tough enough for the
United States Military! Oh, Yes! Experience a Hoffer
meter for yourself. Call us today. |
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