Low Pressure Reciprocating Seals for Hydraulic Control Valves

In tests on low-pressure oil seals the technique of designing a synthetic rubber lip type of rotary seal so that it is “run-in” on the shaft was applied to finishing the lip of a seal for reciprocating duty. The performance of a seal so treated is shown to be greatly superior to that of untreated seals. A new method of measuring the inward load was devised and is described in detail. Interesting data on friction were noted and are shown graphically.

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Methods for testing oil hydraulic control valves

10.3403/30308968u ◽

2015 ◽

Keyword(s):

Hydraulic Control ◽

Control Valves

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The Performance of Low Pressure Tissue-Equivalent Chambers and a New Method for Parameterising the Dose Equivalent

Radiation Protection Dosimetry ◽

10.1093/oxfordjournals.rpd.a079684 ◽

1986 ◽

Vol 15 (2) ◽

pp. 117-130 ◽

Cited By ~ 12

Author(s):

Y. Eisen ◽

R.J. Brake ◽

D.G. Vasilik ◽

B.H. Erkkila ◽

G.J. Littlejohn

Keyword(s):

Low Pressure ◽

New Method ◽

Dose Equivalent ◽

Tissue Equivalent

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Hydraulic Control Valves

Hydraulic Fluid Power ◽

10.1002/9781119569145.ch8 ◽

2021 ◽

pp. 179-237

Keyword(s):

Hydraulic Control ◽

Control Valves

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Paper 6: Hydraulic Control of Valves in Tankers

Proceedings of the Institution of Mechanical Engineers Conference Proceedings ◽

10.1243/pime_conf_1965_180_354_02 ◽

1965 ◽

Vol 180 (12) ◽

pp. 121-131

Author(s):

Victor Pomper

Keyword(s):

Control System ◽

Remote Control ◽

Hydraulic Cylinder ◽

Free Flow ◽

Centralized Control ◽

Hydraulic Control ◽

Level Indicator ◽

Control Valves ◽

Directional Control ◽

Oil Tanker

The 47 800-ton vessel Altair of the Compagnie Navale des Pétroles (C.N.P.) was the first oil-tanker to be equipped with a hydraulic remote-control system of cargo valves. The vessel was delivered at the beginning of May 1959. The opening and closing operations of the valves were controlled from a central panel which was fitted with manually operated directional control valves. The panel was located in the cargo valves' remote-control room which also housed the indispensable remote-controlled level-indicator board. Since then the application of hydraulic remote-controlled valves has become widespread and has taken one of two forms : that of a centralized control system or that of directional control valves located on the deck. Remote-controlled valves are either gate valves operated by a hydraulic cylinder, or butterfly valves operated by a hydraulic rotary actuator. The application of remote-control also allowed the setting up of the ‘free-flow’ system which uses hydraulically operated bulkhead valves. The first ‘free-flow’ oil-tanker was the Sirius of the C.N.P.; it was delivered in 1961. At present it appears that there exists an ever-increasing trend towards automation in the loading and unloading of tanker cargoes. This is accomplished by electrically operated directional control valves, which are connected with electrically programmed systems or with electronic servo-controls.

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