Glob valves;
They fulfill their duties by cutting or opening the fluid passage by placing or lifting the flap connected to the end of a shaft on the fluid passage hole. The flaps are normally in the shape of a plate. Control valves have parabolic protrusions at the ends of the flaps that extend into the through hole. Globe valves have different flow characteristics depending on the plug type.

Advantages:

– They provide precise flow control.

– A good sealing is provided by the frictionless, sitting contact of the flap with the seat.

– There are types suitable for high pressure and temperatures.

– They are also suitable for gaseous fluids.

– They are suitable for frequent and large number of openings and closings.

– Compared to the gate valves, this force application has a positive effect on the sealing, as the stem presses the clapper directly onto the seat. Therefore, Globe valves are preferred instead of Gate valves as shut-off valves, especially in cases where there is a high-pressure flow that may pose a danger to the atmosphere.

Weaknesses:

– Due to their structure, pressure losses are high.

– They contain dead volume. Residues can build up inside the valve.

– Flow is only possible in the direction indicated on the valve. It is not suitable for bidirectional operation.

– At large nominal sizes, very large forces act on the on-off shaft. This force makes it difficult to close. When it comes to the control of large flow rates; It is common practice to divide the flow into two or more small lines and to use small Globe valves.

Fluid Type:

Clean, neutral or aggressive liquid, gaseous fluids

Flow Direction:

It is specified. Flow in the opposite direction is not correct.

Usage places:

Hot and Cold Water Installations, Steam Installations, Hot Oil Installations, Petrochemical Plants, Machinery Manufacturing, Special Vehicle Manufacturing, etc.

Drive Type:

Manually, with motorized actuators, with magnetization in short strokes (Solenoid valves)

Rated Dimensions:

It can be from DN 15 to DN 400.

Operating Temperature Range:

It can expand from -2000C to +4000C. However, they are generally manufactured for the –500C and +2500C range.

Body Material:

Copper alloys (Brass, Bronze), Cast Iron, ductile iron, steel and stainless steel Casting and Steel and Stainless Steel, Duplex, Super Duplex

Type of Connection to Installation:

Screwed, Flanged, Butt Welded

Some relevant product standards:

DIN 3356, ANSI B16.34, BS 1873, BS 5352, BS 5152, BS 5154, BS 5160