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Valve and Actuator Technology for the Offshore Industry
Published in Karan Sotoodeh, Coating Application for Piping, Valves and Actuators in Offshore Oil and Gas Industry, 2023
Unlike ball, plug and gate valves, which are used to stop and start fluid flow in piping systems, globe valves are used for flow regulation. Although the American Petroleum Institute (API) Recommended Practice (RP) 615 valve selection guide states that globe valves may be used for blocking the fluid, the recommendation of the author according to industrial experience is to avoid selecting a globe valve for stop or start of the fluid. However, if a globe valve is required to provide 100% flow passage during complete opening or 0% flow passage during complete closing as part of the fluid control process, then a globe valve can be chosen. Globe valves typically have two main types of design; one is a T-pattern or standard design, and the other is a Y-pattern design. Figure 5.45 illustrates a globe valve including a part list. A globe valve with an actuator for automatic operation is called a control valve, illustrated in Figure 5.46.
Blueprint Reading
Published in Frank R. Spellman, The Science of Wind Power, 2022
Probably the most common valve type in existence, the globe valve principle is commonly used for water faucets and other household plumbing. As illustrated in Figure 6.99, the valves have a circular disk—the “globe”—that presses against the valve seat to close the valve. The disk is the part of the globe valve that controls the flow. The disk is attached to the valve stem. Fluid flow through a globe valve is at right angles to the direction of flow in the conduits. Globe valves are seated very tightly and can be adjusted with fewer turns of the wheel than gate valves; thus, they are preferred for applications that call for frequent opening and closing. On the other hand, globe valves create high head loss when fully open; thus, they are not suited in systems where head loss is critical. The schematic symbols that represent the globe valve are also shown in Figure 6.99.
Overview of the Fermentation Industry
Published in Debabrata Das, Soumya Pandit, Industrial Biotechnology, 2021
According to the motion of the fluid, valves can be classified into two types: control valves with linear motion and control valves with rotary motion. Types of linear motion valve are globe valve, diaphragm valve and gate valve. Globe valves are further divided into four types: single port globe, double port globe, angle and 3-way. The globe valve restricts the flow of liquid by altering the distance between a movable plug and a stationary seat. The globe valve is used in our homes particularly in the wash basin for controlling the flow rate of water. Gate valves are largely used for harvesting purposes and are located at the bottom of the fermenter, after the fermentation is over. Examples of rotary motion valves are ball valve, butterfly valve and disc valve. Ball valves are largely used in the biochemical industry for drawing samples from the fermenter.
Energy efficiency in pneumatic conveying: performance analysis of an alternative blow tank
Published in Particulate Science and Technology, 2021
Adriano Gomes de Freitas, Vitor Furlan de Oliveira, Yuri Oliveira Lima, Ricardo Borges dos Santos, Luis Alberto Martinez Riascos
In addition to the Batchpump (Figure 1(a)), the pneumatic system is composed of two hoppers for material storage, one of which (MG-02) is positioned just above the Batchpump device and feeds it by gravity. The flow of material in the section between MG-02 and the Batchpump is controlled by a pneumatic slide gate valve and two butterfly valves, used to promote the sealing of the Batchpump device material inlet. This valve arrangement is referred to as dosing valves. The air inlet of the Batchpump is controlled by a butterfly valve and a globe valve, which regulates the airflow (Nm³/s) and pressure (mbar). The outlet of the Batchpump is connected to a standard 3-inch pipeline, 130 m length and 5 m height difference between its inlet and outlet ends. A receiving hopper (MG-04) is located at the destination of the pipeline. The conveying cycle finishes at the material conveyance from the hopper MG-04 to MG-02 through a screw conveyor.
Simulation of transient flow in viscoelastic pipe networks
Published in Journal of Hydraulic Research, 2020
Manoochehr Fathi-Moghadam, Sajad Kiani
In order to evaluate and calibrate the parameters of transient flow through a viscoelastic pipe network, a PE pipe network was assembled in the Hydraulics Laboratory of the Faculty of Water Sciences Engineering in Shahid Chamran University of Ahvaz. The network shown in Fig. 2a consists of six 3 × 3 m square loops. PE pipes with a nominal diameter of 50 mm, 5.5 mm wall thickness and a nominal pressure of 16 bar were used. To prevent longitudinal and transverse movement of the system, pipes were restrained by clamps on the ground with a distance of 1 m. A 700 l pressurized tank was used as the upstream boundary condition of the pipe network. To prevent column separation during negative pressure wave propagation, an air compressor was connected to the top of the tank to stabilize tank pressure and provide a constant initial pressure of 40 m for the piping system. A ball valve was used to create a transient flow in the pipe network and a globe valve after the ball valve was installed to adjust the input flow rate to the pipe network. The pressure oscillations were collected in three locations (upstream of the ball valve, pipe network inlet, and in the pressurized tank, designated in Fig. 2a by T1, T2 and T3, respectively) using calibrated pressure transmitters. WIKA S-11 pressure transmitters with a pressure range of 0.0 to 16.0 bar and a full scale accuracy of 0.1% were used in the experiments.
Optimization design and experiments on the self-excited pulsed nozzle
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Houlin Liu, Yanhong Mao, Yong Wang, Zhaoliang Zhang
The comprehensive performance test rig for the self-excited pulsed nozzle was built up in Figure 3, mainly including shooting system, jet impact force test system and cleaning performance test system. The high-speed camera (MotionPro Y4) with the shooting frame rate of 3000 fps was used for filming and analyzing the flow characteristics in the mixing chamber of the nozzle. The jet impact force test system included a pressure pulsation sensor with the accuracy of ±0.1% FS and a data acquisition card. In the cleaning performance test system, the changes of the experiment reagent on the sandpaper were captured and analyzed by the image processing software. This experiment was carried out at the stable inlet pressure of 0.12 MPa controlled by the globe valve.