Results 251 to 260 of about 82,271 (294)

A practical solution to the problem of noise and vibration in a pressure-reducing valve

Experimental Thermal and Fluid Science, 1993
Abstract The mechanical vibration that is occasionally found in gas pressure reducing valves can be eliminated by careful design of the valve plug and seat. A pressure-reducing valve was found to be excessively noisy, producing a sound pressure level of 117 dB when throttling air at an inlet-to-outlet pressure ratio of 15; as a result the valve ...
A. Amini, I. Owen
openaire   +1 more source

Simulation research of proportional pressure-reducing valve

International Conference on Advanced Technology of Design and Manufacture (ATDM 2010), 2010
The electro-hydraulic brake valve is a key component in electro-hydraulic brake system of the wheeled construction vehicles. Its structure and performance parameters have great influence on the braking system. At present, foreign electro-hydraulic braking system used by the electro-hydraulic brake valve structurally similar to direct-acting ...
null Yao Guangwei, null Lin Muyi
openaire   +1 more source

Purposes and Limits of Pressure‐Reducing Valves

Opflow, 1988
This article discusses how pressure‐valves function in a treatment plant or distribution system. The capabilities and limitations of the valves are discussed as well as the role of utility operators in maximizing their efficiency.
openaire   +1 more source

Gas pressure reducing valve noise

Journal of Sound and Vibration, 1975
The application of Lighthill's eighth power of velocity relationship, for the noise generated by turbulent jets, to the special case of noise generated by gas pressure reducing valves, is discussed. An equivalent relationship expressed in convenient valve parameters is developed. Some experimental results are presented which indicate a reduced acoustic
openaire   +1 more source

Pressure Reducing Valves in Pipe Network Analysis

Journal of the Hydraulics Division, 1976
The three separate systems of equations that are in common use in solving steady flow problems in pipe networks are described and the method for including pressure reducing valves in each of these systems is given. The emphasis is on use of efficient computer oriented methods.
Roland W. Jeppson, Allen L. Davis
openaire   +1 more source

Improved Control of Pressure Reducing Valves in Water Distribution Networks

Journal of Hydraulic Engineering, 2008
The behavior of transients in water pipe networks is well understood but the influence of modulating control valves on this behavior is less well known. Experimental work on networks supplied through pressure reducing valves (PRVs) has demonstrated that, in certain conditions, undesirable phenomena such as sustained or slowly decaying oscillation and ...
Prescott, Simon L., Ulanicki, Bogumil
openaire   +1 more source

The Analysis and Design of Hydraulic Pressure-Reducing Valves

Journal of Engineering for Industry, 1967
This paper presents the static and dynamic characteristics of single-stage pressure-reducing valves and establishes design criteria. The dynamic analysis was accomplished using frequency-response techniques. A simplified loop gain function is developed for the valve and consists of a loop gain constant and two dominant time constants.
openaire   +1 more source

Dynamic research of Pressure-reducing Valve

2021
The principle of work of the Pressure-reducing Valve is shown as an example of linear automatic control system. The dynamics of a constant pressure control device is considered. The low internal resistance of a pressure source for the whole range of fluid flow is assumed.
openaire   +1 more source

A Parametrized NMPC Strategy for Pressure Reducing Valves

2016
Water loss due to leakage is a major concern for water distribution operations. Being mainly caused by pipe deterioration and high values of pressure, these have several negative features. Pressure Reducing Valves (PRV) are used in water supply networks to keep the pressure under acceptable values in order to reduce physical water losses. However, such
Carlos Felipe Ilha Pereira, André Murilo, Anderson Quadros, Walter de Britto Vidal Filho   +3 more
openaire   +1 more source

[Safety of oxygen-pressure-reducing valves].

Annales francaises d'anesthesie et de reanimation, 2000
When a gas cylinder valve is opened slowly, as required, the associated pressure reducing valve works properly and gas expansion decreases the temperature of the device proportionally to the delivered gas flow. Conversely, when the valve is opened rapidly, the pressure in the high pressure chamber grows suddenly from 0 to 200 bars in the case of a full
openaire   +1 more source