Air valves with a large opening are intake and exhaust valves that serve for the proper functioning of the pipeline. They are used to remove air from the pipeline before commissioning and to prevent the forming of underpressure when emptying the pipeline or a breakdown in the pipeline system. They are installed at the highest turning points of the pipeline and connect it to the outside atmosphere, acting completely automatically.
Air valves with a small opening are automatic exhaust valves that serve for the correct operation of the pipeline. Their role is to relieve the air released from the water into the atmosphere during operation. They are installed at the highest breaking points of the pipeline, and thanks to their functioning, the pipeline connects with the outside atmosphere.
Assembly- disassembly parts are devices that are installed in pipelines as connecting elements. They enable easy and simple installation of elements of pipe fittings and measuring and regulating devices using the possibility of adjusting the installation length.
Backwater valves are used as non-return shut-off devices at the ends of pipelines and channels that close on their own after the liquid has drained. They allow the passage of liquid in one direction, and prevent the return flow of liquid and the entry of foreign objects into the pipeline. The role of backwater covers is to protect against floods in conditions of high water level at the main drainage channels.
Blind steel flanges are used to close pipe ends or for closing the tee pieces. They are also used in the testing of pipe closures. Blind steel flanges are connected by screws to the flanges of pipelines, tee connections or pipe closures with a seal between them.
Butterfly check valves are protective devices in pipelines and pipe systems for transport and storage of liquid fluids. They are used to prevent the return flow of the working fluid, and the action of the butterfly check valves is automatic. They are most widely used in plants for obtaining, preparing and distributing water, in wastewater treatment plants, in utility facilities, in irrigation systems, in various plants of the chemical and petrochemical industry and in energy plants. Butterfly check valves allow fluid flow in only one direction, so during installation, care should be taken that the direction of the arrow on the butterfly check valve housing corresponds to the direction of movement of the working fluid in a particular pipeline.
Butterfly valves are devices used to interrupt and restore fluid flow in pipelines and piping systems. By placing the shut-off device in the intermediate position, it is possible to regulate the flow. Butterfly valves are applicable for operating pressures up to 40 (bar), temperatures up to 250 (° C), on request and more, have a compact design and low flow resistance, good controllability, remote control and installation in any position and easy handling and maintenance. Thanks to these characteristics, butterfly valves are most widely used in plants for the production, preparation and distribution of drinking water, in irrigation plants, in water cooling devices, in power plants, in heating and air conditioning systems, in compressed air installations, in plants for pneumatic transport and distribution of natural gas, for a large number of processes in the chemical, food and paper industries and other areas of economic activity.
Butterfly valves with rubber coating are most often used as shut-off devices in pipelines for the transport of various fluids. As control devices, they are used when the fluid flow rate is relatively low. Compared to classic devices that have the same function, butterfly valves with a rubber coating have significant advantages. Simple and compact construction, significantly shorter installation length and lower shutter weight reduce the space required for installation, speed up and facilitate installation, handling and maintenance. The sealing rubber lining eliminates the possibility of contact of the working fluid with the shutter housing, allows the use of a standard housing for the flow of different fluids by changing the quality of the lining. They are used in plants for the transport of drinking, sea, technological, geothermal, waste and other waters, in the chemical and food industry, in the industry of alcoholic and non-alcoholic beverages, as well as for the transport of oil and oil derivatives, air and various acids and gases.
Conical shut-off valves are devices intended for installation at the outlet of the pipeline. Depending on the need, conical shutters provide absolute closure of the flow section, regulate the flow or reduce the energy of the output working fluid. Thanks to these properties, conical seals have found application in hydroelectric dams, in places of permanent discharge of water from reservoirs, in places of occasional discharge of water and where discharge of water is in flood control schemes.
These reducers are used as mechanical devices for manual or electro-mechanical drive of pipe shutters or as pre-gears for worm gearboxes. If the worm gearbox cannot reduce the closing speed of the pipe shutter sufficiently or if the available amount of input torque cannot be increased by the worm gearbox to the amount of output torque required to open and close the pipe shutter, then a suitable cylindrical gearbox is installed in front of the worm gearbox.
Dilatation compensators are installed in pipelines as elements primarily intended to compensate displacements resulting from thermal and other dilatations. In addition to this, they enable easy and simple installation of pipe armature elements and measuring and regulating devices using the available displacements within the limits.
Expansion joints are devices used in pipelines as connecting and compensating elements for displacements resulting from thermal and other dilatations. They allow easy and simple installation of pipe fittings and measuring elements and regulating devices using available displacements in the range +/- Δ1. Due to the relatively small installation length, expansion joints are particularly suitable for installation in manholes.
Flat plate gate valves are intended for installation at the ends of pipelines from which fluid flows continuously or intermittently, whereby the valve can be fully or partially opened or closed. They are particularly suitable for closing drainage pipes in drinking water wells, for closing pipes by which fluid is transferred from one tank to another in a controlled manner, and for closing pipes in similar places.
Flat steel flanges are used to make flange joints in the manufacture of pipelines and reinforcement elements. They are connected to the pipes by welding or brazing.
Flat steel flanges of type "G" are used for the production of flange joints in the manufacture of pipelines and fitting elements when there are butterfly valves with rubber lining ("Keyston" type valves) between them. They are connected to the pipes by welding.
Float angle valves are shut-off and regulation devices that mainly serve for automatic regulation of the water level in the tank, ie. to keep water levels at the desired height.
Gibault-couplings are used to connect asbestos-cement pipes in pressurized pipelines. Note: Gibault joints can also be used to connect cast iron or rigid PVC pipes, but then the diameter D1 must be adjusted to the outside diameter of the pipe.
Knife gates are devices that serve as shut-off devices in pipelines. They are widely used in utility facilities of water supply, sewerage and heating, in energy facilities for the production of steam, hot water and compressed air, in shipbuilding, metallurgy, chemical and petrochemical industry and other branches of economic activity. The use of valves is especially recommended in pipelines in which they are completely open or completely closed during operation, and the flow of working fluid can be in both directions.
Check valves are devices designed to prevent the return flow of the working fluid. They are installed in pipe systems to prevent leakage and loss of working fluid and to protect devices from damage that would produce backflow of fluid. These are self-acting devices, which perform their function automatically, without a drive system. They alowe the fluid to flow in one direction, otherwise their shut-off body automatically closes the bright opening of the pipe and thus prevents undesired backflow of fluid. Closing is done with the help of a spring and the pressure force of the return fluid. Check valves can be mounted in horizontal and vertical position, and since they allow the flow of working fluid only in one direction, it is necessary to pay attention during installation that the direction of the arrow on the valve housing corresponds to the direction of movement of working fluid in a given pipeline. They are used in plants for obtaining, preparing and distributing water, in communal facilities, in irrigation systems, in various plants of the chemical and petrochemical industry and in energy plants.
The name of piston-ring valves is derived from the design characteristics of the valves themselves. Piston-ring valves are mainly used in systems where large pressure differences and high flows occur. Their application is mainly in water supply systems, power plants, industrial and process technology and other branches of economic activity. According to a large number of design variants, piston-ring valves have a multiple role in pipe systems and are used as: shut-off devices, measuring devices, pressure and flow regulators, safety devices, safety devices with check valve function, valves with drain and flush outlets.
Thanks to their constructive characteristics, plate shutters find significant application in many areas of economic activity. They are most widely used in reclamation systems, water treatment plants, hydroelectric power plants, thermal power plants, in drainage and water intake systems of reservoirs.
Plateknife gate valves are devices that serve as shut-off organs in pipelines through which pulp, liquids containing sand, crystals and other impurities are transported. They are used in water purification and preparation plants, pumping stations, the pulp and paper industry, in the food, pharmaceutical, chemical and paint and varnish industries, in refineries, sugar factories and other places. The use of plate valves is recommended in pipelines in which they are completely open or completely closed during operation, and the flow of working material can be in both directions.
Safety valves are devices that automatically, without the aid of any energy other than the energy of the working fluid, release a certain amount of fluid so as to prevent the preset pressure from being exceeded. They are used in energy facilities for water production.
Strainers are devices used to prevent the passage of smaller foreign objects and various impurities through the pipeline. In order to increase safety at work, they are installed in front of fittings, pumps, measuring and regulating and other devices.
Suction baskets are devices that are installed at the beginning of suction pipelines in order to prevent the entry of larger foreign particals into the pipeline and to prevent the return flow of the working fluid. They are used for fresh and sea water, chemically non-aggressive and aggressive fluids, as well as for fluids with by the content of abrasive particles.
Swing check valves are protective devices in pipelines and pipe systems for the transport of liquid fluids. They are used to prevent the return flow of the working fluid, and their action is automatic. They are most widely used in drinking water distribution systems and irrigation, wastewater treatment and transport systems, as well as in district heating systems. The non-return (check )valves allow flow in only one direction, which is why during installation you should pay attention to the fact that the direction of the arrow on the check valve housing corresponds to the direction of movement of the working fluid in the specific pipeline.
Swing check valves-aslope are protective devices in pipelines and pipe systems for fluid transport. They are used to prevent the return flow of the working fluid, and the action of the swing check valves - aslope is automatic. They are most widely used in waste water transport plants, when the available pump pressure is low and the return water can be under atmospheric pressure (without overpressure). Check valves - aslope allow fluid to flow in only one direction, so during installation, care should be taken that the direction of the arrow on the valve body corresponds to the direction of movement of the working fluid in a specific pipeline.
Most often, in practice, the place of installation of air valves with large and small openings coincides, so, naturally, the design of an air valve with two balls was performed, which executes the functions of an air valve with both large and small openings. Two-ball air valves remove air from the pipeline before commissioning, remove air that is released from the water during operation, and also prevent the occurrence of underpressure when emptying the pipeline or a breakdown in the pipeline system.
Weld neck flanges made of steel, are welded to pipes, elbows, tee type, pipe shutters and similar elements.
Welded pipes are designed for the production of certain sections of pipelines for the transport of fluids under a certain pressure.
These worm gearboxes are used as mechanical devices for manual or electro-mechanical drive of pipes shutter. The gearbox reduces the input speed of the shut-off device, ie. the closing speed of the pipe shutter to the permitted or agreed sizes. At the same time the reducer increases the available amount of input torque to the amount of torque at the output of the reducer required to open or close the pipe shutter.