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  1. Blow down valves

Blow down valves

Blow down valves

The purpose of blowdown valves is to depressurize the equipment by sending the unwanted gases to flare. Blowdown valves are emergency on-off valves activated by a signal from the Emergency Shut Down (ESD) system, rather than direct activation by overpressure in the protected equipment. Blowdown valves are on-off valves, often installed in a parallel configuration to pressure relief valves on equipment. This depressurization is different than equipment protection performed by pressure relief valves. Certain on-off valves are closed on emergency shutdown (ESD) of a system. Closing of these valves can lead to overpressure in some process equipments. At the same time, ESD system sends signal to open up the blowdown valves and to release the excess gas to flare, thus preventing an overpressure scenario.

Since blowdown valves are simply on-off valves, they cannot restrict the gas flow. The blowdown lines are often equipped with restriction orifices downstream of blowdown valves to restrict the gas flow being sent to the flare to a certain limit.

The term gas blow down is referred to venting of gas accumulated in equipments, process facilities, oil production wells etc. The gas which is to be blown down is not desired to be used for production of a variety of possible reasons and is usually vented through a flare. The flare burns the hydrocarbons before venting product gases to atmosphere.

Gas blowdown in pressure vessels

Emergency shutdown of some processing facilities may end up in sending high pressure gas to certain other pressure vessels, leading to overpressure. To prevent this overpressure scenario, these pressure vessels should be equipped with blowdown valves in addition to the pressure relief valves. Blowdown valves are triggered by the same emergency shutdown to open up and send the excess gas to vent or flare.
Gas blowdown in oil production wells

Oil production wells which have been shut in for a period, can develop a gas cap at the wellbore by accumulation of the gases percolating through the formation. It is desirable to remove this gas cap by flaring the accumulated gases before starting well intervention. This flaring of gases is referred to as casing blowdown.

Other equipments connected to the well to handle the produced fluids are often equipped with blowdown valves as well. These blowdown valves act to prevent the overpressure in case of emergency shoutdown as discussed above.

Hofamat Burners

ITT Controls also supplies products and parts made by Hofamat. This brand has a wide range of burner and combustion products ranging from 12kW up to 10900kW. Hofamat has merged with another strong player in the field and has a strong industry advantage compared to the rest of the competition and continues developing superior quality and efficient combustion equipment.

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GSR Valves

ITT Controls also supplies products and components made by GSR Ventiltechnik. Due to their expertise, commitment of a customer-oriented team, the excellent quality management system and over 40 years of experience in developing customer-oriented special valve solutions GSR Ventiltechnik has a leading position in the valve market industry. It is therefore not surprising that ITT Controls supplies valves and components of this brand.

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Hermann Burners

ITT Controls also supplies products and components made by Herrmann Oil and Gasburner. The long experience as a manufacturer of oil and gas burners gives the best solution to customers economically, technically and environmentally a brand can offer. The high quality standard of these products is documented by the quality management system according to DN and ISO 9000: 2000.

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SIT Controls

ITT Controls also supplies SIT products and components for the petrochemical and process industries. Sit's equipment for safety, control and regulation are suitable for many applications. One should think of wall-mounted and freestanding boilers, stoves, fireplaces, patio heaters, clothes dryers, water heaters, household stove, pool heaters, heating systems for recreational vehicles and catering equipment such as ovens, fryers and bain maries.

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Delta Controls

ITT Controls also supplies products and components from Delta Controls. In the petrochemical and process industry these products are widely used and indispensable for every / HVAC maintenance. The brand itself no longer exists but many products and parts are still available. ITT Controls can help if you need anything.

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