Safety valves, adjustable Genebre

Regulating safety valves are of great importance for the safe operation of any system in which water, steam or other matter can be exposed to strong pressure. The pipeline, through which it passes, can not hold the pressure. As a result, an explosion can occur with all the ensuing consequences. What are the adjustable safety valves, how do they work?

Safety valve functions

Safety adjustable valves are for direct-acting stop valves. They work directly with the environment that carries out production processes. Most often it's water. Instead, it may be air, steam, natural gas, ethylene glycol or other substances that do not interact with the materials used to produce the valve.

The pressure relief valve has two functions. First, it releases the working medium as the pressure inside the system increases. But then it also blocks the way out of it. This occurs immediately after the pressure inside the system stabilizes.

Application

Adjustable safety valves are installed on:

• Industrial systems;
• Household.

They prevent the influence of external and internal factors. The first include various malfunctions in the operation of equipment or the influence of external sources of elevated temperature. These may be errors when installing the system or the device itself.

Internal factors are physical processes inside the device or system that lead to increased pressure.

Principle of operation

The operation of the valve is based on the fact that there are two elements inside it that are in equilibrium for some time. The part, called constipation, keeps the working mixture from exiting the system. It does not allow the motion of the spring (s), which has a certain compression force. But when the pressure inside the system passes the operator-defined line, the spring is no longer able to hold the constipation. It contracts, the lock (bushing) rises, and the medium under pressure presses out - where it will be directed by the valve design.

After the pressure is stabilized, the spring returns to its original position, pushing the latch back into place.

Requirements for valves

They have to:

1. In time and without fail, open the constipation at the indicated pressure parameters.
2. Possess the capacity to quickly reduce excess pressure.
3. It is obligatory to return the lock to the place, ensuring the integrity of the system.

Classification

It is carried out by various parameters.

According to the principle of operation, the safety valves are of direct and indirect action (in order for it to work, a source of electricity is needed).

They can be divided according to the material from which they are made (brass, cast iron, steel).

By the nature of the rise of the constipation valves are divided into devices of proportional action and two-position.

In addition, the valves can be small, medium and full-lift. And that's not all possible classifications.

Safety valve adjustable Geneble 3190 (Spain)

According to the type of connection, it refers to the coupling. The working medium can be water, steam, neutral gases and liquids.

Its body is made of high quality bronze. The safety valve 1 "is adjustable and has a brass body. The spool and the glass are brass. The spring is made of galvanized steel. Teflon gasket.

The working pressure of the valve is 16 kgf / m ² (bar).

The pressure is adjustable from 1 to 12 kgf / m ² . At the factory, this value is set to 3 kgf / m ² .

Adjust the operating pressure by adjusting screw. If you rotate it clockwise, the value increases, and if it is against, it decreases accordingly.

Allowed an overpressure of up to 10% of the norm.

The operating temperature is -10 ° C to 180 ° C, the maximum temperature is 200 ° C.

Mounting

In order to properly install the valve, you need to look at the direction indicator medium, located on the body.

Placement of the valve should be vertical, otherwise it will not work.

To ensure that the working environment does not flow, use materials that do not react with it.

For installation, install the valve on the pipe and clamp the key to the mark inside the thread. The nut can not be squeezed. The branch pipe is directed downwards so that the liquid does not return back, and is fixed so that it does not press on the body.

Valve Adjustable Valtec

The safety valve Valtec 1831, a coupling valve, discharges water or other working fluid (gas) after the pressure in it rises above the permissible value.

Valve arrangement

The spool with the gasket is located inside the case. It is supported by a spring in the glass, which protects it from outside effects.

The degree of its compression is regulated by means of a thrust washer. The forced-release sleeve, which is held by the rod with two nuts, comes into contact with the adjusting sleeve. Thus, the spring is compressed, but not critically.

When the pressure increases above normal, the spring contracts more tightly, the spool opens. Water or other matter leaves through the branch pipe. The pressure drops, which was required from the valve.

After the pressure has dropped and has returned to normal, the spring is unclenched. After all, the bushing on it no longer presses so much. The system is sealed.

Characteristics

The diameter of the seat can be from 1/2 "to 2" in increments of 1/4 ", 2, 2½" and 3 ".

The full opening pressure is 1.1 from the setting pressure, closing is 0.9 from the setting pressure.

The operating temperature of the medium is not higher than 180 ° C.

The valve operates in the temperature range from -25 ° C to 60 ° C (for water).

At the same time, it is designed for 5,000 cycles and usually serves no less than 15 years.

Warranty and insurance are provided for all Valtec valves up to 7 years.

Safety valves can be opened manually. This is done in order to check their serviceability. It is advisable to check them every six months.

Valves safety adjustable Geneble and Valtec comply with GOST 12.2.085-2002 and GOST 24570-81.