The angle globe valve is a modification of the basic standard pattern globe valve where the ends are at an angle of 90 degrees. The Red Point® angle globe valves have a streamlined curved bore to create optimal flow and lower CV value. They are used in applications that have periods of pulsating flow because of their capability to handle the slugging effect of this type of flow. To avoid accumulation and crystallization of the medium, packing flushing and heating steam jackets can be added to the valve design.
The angle globe valve’s opening and closing sections are plug-shaped valve discs, the sealing surface is smooth or conical, and the flap travels linearly down the fluid’s centerline. The inlet and outlet channels of an angle globe valve, also known as an angle valve, are not in the same direction, creating a 90° right angle. This form of globe valve allows the medium flowing through it to change its flow path, resulting in a pressure drop.
Applications of Angle Globe Valve
Angle globe valves can be used in pipelines for gasoline, mineral, pharmaceutical, fertilizer, electric power, recycling machinery, gas supply, cooling and freezing systems, boiler steam systems, hot oil systems, and other industries. It can be used to break off or link the pipeline medium in various working conditions, from nominal pressures of 150LB to 2500LB and working temperatures of -40 to 500°C.
They are suitable for pipelines that do not have strict requirements for fluid resistance, i.e., pressure loss.
These valves come in a practical size limit of NPS 12 (DN 300). Valves larger than NPS 12 (DN 300) are rarely used. However, sizes up to NPS 48 (DN 1200) have been manufactured and used.
The pressure difference across the valve disc must not exceed 20 percent of the maximum upstream pressure or 200 psi (1380 kPa), whichever is less.
These valves can be considered for the equipment or pipelines with flow medium at high temperature and high pressure, and pipelines with steam mediums and DN<200mm.
These valves are generally installed for low-temperature and low-pressure applications so that pressure is under the disk.
For high-temperature and high-pressure applications, like steam, valves are installed so that pressure is above the disk.
These valves can be used for small applications as valves for instruments, sampling, pressure gauges, etc.
For highly toxic mediums, valves with bellow seals should be used.
Advantages of Globe Angle Valves
The Angle pattern globe valve is a modified version of the “T”-Pattern Globe valve with an inlet and outlet at right angles.
When fitted at a change in piping direction, this valve eliminates a bend and has the advantage of a smaller pressure drop than a conventional “T” pattern globe valve.
Angle valves have the same features of the stem, disc, and seat ring design as the globe valve.
The fundamental difference between the two is that the fluid flow through the angle valve makes a 90° turn.
These valves offer less resistance to flow than a globe valve with an elbow which it would replace.
An angle valve reduces the number of joints in a line, in addition to saving installation time.
They are also used in applications that have periods of pulsating flow because of their capability to handle the slugging effect of this type of flow.