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Gases industry review--Q & A.
Question: While discussing the specifications of a manifold with my distributor, he recommended that the manifold befitted with both station valves and check valves at the cylinder connections. Isn't this kind of a belt and suspenders recommendation or, worse yet, is he just trying to fatten-up the sale?
Answer: No! There are practical safety and operational reasons for building a manifold with both station valves and pigtail check valves. For example, in the event of a ruptured pigtail, the station valves provide a means of isolating the station with the bad pigtail so that the entire manifold is not discharged. The check vanes provide both safety and purity benefits. Check valves keep air from entering the pigtails and the manifold during cylinder change outs. Check valves also keep the manifold from discharging its contents if someone disconnects prematurely or fails to close a station valve. In any event, a manifold should always have either station vanes or check valves.
As far as the fatter sale is concerned, a manifold with station valves and check valves has ...
- Check valves for submersible installations: the fundamentals of pumped water...
- Magazine article from: National Driller Pelikan, Robert June 1, 2008 700+ words
Check valves permit water flow in one direction only...Some submersible pumps have built-in check valves, and are suitable for operation without...application and installation. Types of Check Valves Spring-loaded, stem or cage poppetstyle...
- Effect of evaporator section lengths and working fluids on operational limit of...
- Magazine article from: American Journal of Applied Sciences Meena, P. Rittidech, S. Tammasaeng, P. January 1, 2009 700+ words
...or more direction-control one-way check valves in the loop so that the working fluid...studies the oscillating heat-pipe with check valves. It was found that the CHOHP/CV...looped oscillating heat-pipe with check valves (CLOHP/CV). It was found that the...
- Check valves: Oak Ridge's new diagnostics.
- Magazine article from: Mechanical Engineering-CIME Haynes, Howard D. May 1, 1991 700+ words
Check valves are used extensively in nuclear plant safety...resulting from instability (flutter) of check valves under normal plant operating conditions. During the last five years, check valves have received increased attention by the...
- Effect of evaporator lengths and ratio of check valves to number of turns on...
- Magazine article from: American Journal of Applied Sciences Rittidech, S. Meena, P. Terdtoon, P. March 1, 2008 700+ words
...looped oscillating heat-pipe with check valves (CLOHP/CV) in Fig. 1. is a very...looped oscillating heat-pipe with check valves (CLOHP/CV). Akachi et al. (1...loop oscillating heat-pipe with check valves (CLOHP/CV). This type is a closed...
- Check valves.(Fluid Power)
- Magazine article from: Design News June 7, 2004 700+ words
Barbed and threaded The company has released information about three of their lines of check valves: barbed check valves, threaded check valves, and duckbill check valves. The barbed check valves are manufactured with a polished barb...
- Check valves. (Supplier's Market Place).
- Magazine article from: Dairy Field April 1, 2002 700+ words
Bradford's check valves feature quick-disconnect clamp...ends) for quick and easy cleaning. Check valves are used for sanitary as well as...applications to prevent backflow. Spring check valves are designed to assist in closure...
- Installing Check Valves in Submersible Pumps.(Brief Article)
- Magazine article from: National Driller Pelikan, Robert May 1, 2001 700+ words
Check valves permit water flow in one direction only...Some submersible pumps have built-in check valves and are suitable for operation without...Spring loaded, stem or cage poppet style check valves should be used with submersible pumps...
- Check valves and pumps. (Pumps and valves in focus: the latest products and...
- Magazine article from: Medical Device Technology June 1, 2002 700+ words
...Products manufactures a range of pumps, check valves and related components that are designed...s check valve range includes cartridge check valves with no end fittings, check valves with modular end fittings, luer/barb check...
