Safety Hydraulic Valve KPG

Oil and gas production is a very specific type of production and economic activity. One of the distinguishing features of this type is a wide variety of used equipment, responsible for performing a particular kind of functions.

In general, all equipment used in the oil and gas industry can be divided into several interrelated categories. We give, as an example, several of them:

1) Complex technical equipment - devices and installations designed for the extraction, processing, storage and transportation of oil and gas;

2) Pipeline fittings - products used in equipping pipeline systems (cranes, latches, gates, etc.);

3) Tank equipment - equipment intended for the integration of different types of tanks (vertical / horizontal) and volumes;

4) Electro-technical (light masts, supports, etc.) and cable-conductor products.

Among other things, in the structure of the above categories, it is customary to highlight the most vivid (important) subcategories. For example, for reservoir equipment, the basic subcategory is respiratory equipment (or respiratory equipment). These means are all kinds of respiratory valves, such as CMD, SMDK, KDM, NDKM and KPG. Consider one of these types - safety hydraulic valves KPG.

So. The hydraulic safety valve KPG is used as a device whose main functional duty is to prevent the destruction of the tank structure with oil products in the event of an overpressure increase in pressure. The main structural elements of this valve are represented by a casing with a connecting flange, a cup, a casing with a branch pipe, a shield, a fuse, a cover, a drain-fill pipe, drains, a transition flange.

The principle of operation of this valve is as follows. When there is an increased pressure in the tank, the liquid in the cup is displaced into the branch pipe (it is customary to use transformer oil in accordance with GOST 982-80 as the fluid used). Further, when the super-permissible pressure is reached, this liquid is ejected onto the screen, reflected from it, and accumulates in the annular plane. Discarded in this way, the liquid passes through the drain connections and is re-used for pouring. After carrying out this process, the gas-air space of the tank structure communicates with atmospheric air through free gas passages, thereby ensuring the release of excess pressure.

Special requirements are imposed for the maintenance of such valves. During operation, the CPG valves must undergo systematic checks:

- at a negative ambient temperature - at least once every nine days;

- with a positive temperature background of the environment - at least twice a month.

At the same time, during preventive inspections, it seems necessary to wash with gasoline or a solvent of the fire fuse cassette, and also to blow it with compressed air to remove any tarry and dust deposits.

In addition, when inspecting hydraulic valves, it is necessary to check the fluid level of the hydraulic seal, maintaining it in the optimum ratio in accordance with the operating instructions. Water and ice formed in the cavity of the valve due to condensation processes are subject to immediate removal.

An important feature - the operation of the valve in the autumn-winter period is carried out without a fuse.

One of the main requirements for installation, maintenance and overhaul of this type of equipment is the use of intrinsically safe tools, as well as the use of repair kits (for repair) only those manufacturers who manufacture the valve itself.

The average common operating time for the failure of the safety hydraulic valves KPG is thirty-six thousand cycles (one cycle means one opening and closing of the valve), and the average service life is 15 years.