POYAM Valves company is the trade name of a special pipe valve production unit of the AMPO S. Coop corporation (Spain) being a partner of Techengoil AO.
POAM Valves was founded in 1964. One of the most important advantages of the AMPO-POYAM company is that its own foundry facility is located close to the valve production unit in Spain.
- Special valves
- High-pressure shutoff valves
- Ball valves with metal seats
- General-purpose valves
- Cryogenic valves
Screw compressor-based plants
Application:
These are used at small- and medium-size throughput values and efficient if compression of gas in one stage at a high compression ratio is required. These are widely used at oil and gas production installations, oil refineries and in the energy sector. They usually come complete with electric motors or gas reciprocating engines.
Limitations:
Volumetric output up to 11,500 m3/h (at suction), power up to 2500 kW. Discharge pressure up to 52 bar (abs). The volumetric output of such a compressor may vary as a function of compression ratio values: the higher this value is the lower is the flow rate. Such compressors are not used to handle aggressive and corrosive media and fat gases and those with a high content of water vapours.
Placement:
In container-type enclosures, easy-to-erect buildings in workshop versions.
Output control:
By a slide valve, shaft rotational speed, bypassing gas to the suction side.
Rotary vane compressor-based plants
Application:
These are used at small-size throughput and medium-size compression ratio values if compression of gas in one stage is required as well as at low pressures (close to atmospheric pressure) at suction of a compressor plant. These are widely used at oil and gas production installations. They come complete with electric motors. It is possible for these compressors to be manufactured in a two-stage configuration to allow obtaining higher pressures at discharge.
Limitations:
Volumetric output up to 3500 m3/h (at suction), power up to 500 kW. Discharge pressure up to 10 bar (abs). As a rule, such plants are used at oil and gas production facilities for compression of hydrocarbon gases from final separation stages with high contents of fat components and water vapours.
Placement:
In container-type enclosures, open-type installations placed outdoors.
Output control:
By shaft rotational speed, bypassing gas to the suction side.
Reciprocating compressor-based plants
Application:
These are practically used in all output ranges, at pressures on the suction side of a compressor higher than atmospheric pressure and at high discharge pressures. These are not capable of running under vacuum conditions due to the peculiarities of their principle of operation. These are widely used at oil and gas production installations, oil refineries and in the energy sector. They usually come complete with electric motors or gas reciprocating engines.
Limitations:
The area of application is limited by considerably higher output values when it is most reasonable to use a centrifugal type of compressor. Discharge pressure up to 1000 bar (abs). These are practically used with all types of gases. It is possible to use them in a lot of applications for compression of special, corrosive and aggressive gases depending on the purpose of a technological process by modifying the construction of a compressor, its lubrication system, design of the cylinder block.
Placement:
In container-type enclosures (up to 800 kW), open-type installations placed outdoors, in individual shelters and general-purpose workshops (more than 800 kW).
Output control:
By valve unloaders, clearance pockets, shaft rotational speed, bypassing gas to the suction side.
Centrifugal compressor-based plants
Application:
These are used at considerably higher output values and efficient for pumping gas in main pipelines, injecting gas in a formation / underground storage facility and when it is necessary to supply oil-free gas to a process. They are capable of providing high pressure at discharge. These are widely used at oil and gas production installations, oil refineries and in the energy sector. They usually come complete with gas and steam turbines and electric motors.
Limitations:
It is possible to use them practically in all flow and pressure ranges. If used with a gas turbine, these are capable of running at considerably higher power (gas pumping units). It is necessary to try to avoid using this type of compressor with gases with high contents of mechanical impurities and capillary liquid, which may cause the compressor to get out of order or fail to operate. These are used in those cases when the application of other types of compressor is unreasonable.
Placement:
In container-type enclosures, as open-type installations outdoors, in individual prefab modular buildings and hangar-type shelters, in general-purpose workshop.
Output control:
By shaft rotational speed, bypassing gas to the suction side, IGVs.
Liquid ring compressor-based plants
Application:
These are used at small- and medium-size output values, relatively high compression ratios as well as at low pressure values on the suction side of a compressor plant. Theses are efficient in case of compression of gas with presence of mechanical impurities, corrosive gases and hydrogen in it and are mainly operated at oil refineries in connection with the need for supply of operating fluid (water) which creates a water ring inside the compressor and may be used at oil and gas production facilities. They come complete with an electric motor.
Limitations:
Volumetric output up to 12,000.00 m3/h (at suction), power up to 1500 kW. Discharge pressure up to 14 bar (abs). The volumetric output of the compressor may vary as a function of the compression ratio value: the higher the compression ratio is the lower is the flow rate. They are mostly used for compression of corrosive gases, sulfurous gases, hydrogen-bearing gas and gas with high contents of fat components and water vapours.
Placement:
In container-type enclosures, as outdoor open-type installations with preliminarily mounted heat insulation and heat tracing devices on liquid-phase pipelines.
Output control:
By shaft rotational speed, bypassing gas to the suction side.
The working agent heating units are used at oil and gas production installations for useful utilization of associated petroleum gas, gas from final petroleum separation stages and flash gas.
Service:
The working agent heating units are designed for use at oil and gas fields and oil refineries and serve to assure fulfillment of the technological process connected with the increase in temperature of various fluids.
Limitations:
There no limitations as to associated petroleum gas output. Operation with gas with a high content of sulphur-containing compounds can be regarded as the only limitation.
Placement:
On an open site with preliminarily mounted heat insulation, maintenance platform railings and protective equipment preventing personnel from being in contact with the hot surfaces of a plant.
Configuration variants:
It is possible for several working fluids to be heated simultaneously by using single-flow, two-flow and three-flow operation patterns. Heating is assured by installation of individual lines with recuperators and smoke exhausters.
Techengoil AO constructs the following types of gas treatment plant.
Gas treatment by adsorption
Application:
It is used at oil and gas production installations and energy facilities for preparation and treatment of hydrocarbon gas with its subsequent supply to the main pipeline, for own consumption and to consumers of fuel gas.
Limitations:
Adsorption dehydration of gas is used when it is required to obtain a low dew point (less than minus 20…minus 30°С) or for the selective cleaning of gas of impurities.
Types of adsorbent:
Zeolites, silica-gels, activated carbon, ionites and other sorbents whose pores have considerable specific areas.
Gas treatment by absorption
Application:
It is used at oil and gas production installations and energy faculties for preparation and treatment of hydrocarbon gas with its subsequent supply to the main pipeline, for own consumption and to consumers of fuel gas.
Limitations:
Absorption dehydration of gas is used when it is required to obtain a dew point (more than minus 20…minus 30°С) or for the selective cleaning of gas of impurities.
Types of absorbents:
Monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diglycolamine (DGA), diisopropanolamine (DIPA), methyldiethanolamine (MDEA), alkaline solutions, ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG) and propylene glycol (PG) and other sorbents.
Low-temperature separation
Application:
It is used at oil and gas production installations, energy facilities, natural gas processing plants of gas-condensate fields for simultaneous dehydration (water removal) and extraction of target components (heavy hydrocarbons).
Limitations:
Low-temperature separation of gas relates to treatment of natural gas at production installations for extraction of liquid hydrocarbons and water from gases by flash condensation at reduced temperature with separation of equilibrium gas and liquid phases. It takes place at average negative temperatures (approximately from 0 to -50°C).
Types of plant:
- With external cooling cycle
- With internal cooling cycle
Placement:
In container-type enclosures, in easy-to-erect buildings in a workshop version, on open sites in fully shop-assembled condition.
Centrifugal pumps
At the present time the centrifugal pumps are manufactured as equipment capable of transferring and pumping liquid.
The modern centrifugal pumps of various types have more or less one and the same design where there is a body and a working member represented by an impeller. The impeller is provided with special blades capable of moving liquid inside the unit. As a result of action of centrifugal force, liquid is transferred from the inlet device to the outlet valve, in which case certain pressure is created.
Areas of application of pumps:
- High-pressure boiler feeding
- Oil refining
- Petrochemical processes
- Chemical industry
- Water injection
- Descaling
- Demineralization
- Other applications under high pressure
Types of supplied pumping equipment
- Single radially-split casing multi-stage pump
- Single radially-split casing multi-stage medium-pressure pump
- Double (barrel) radially-split casing multi-stage high-pressure pump
- Two-stage pump with radially-split casing between bearings
- Multi-stage high-pressure pump with axially-split casing and diffuser
- Multi-stage axially-split double-volute high-pressure pump
- Horizontally-split casing pump with double-entry impeller
- Single-stage pump with radially-split casing between bearings
- Centerline-mounted single-stage overhung pump
- Hot water circulation pump and boiler-fluid circulating pump
- Foot-mounted single-stage overhung pump
- Vertical inline design pump
- Vertical leak-tight barrel (double-casing) pump
- Vertical mixed flow / turbine pump
- Vertical chemical slurry pump
Piston and metering pumps
The piston pumps are based on the simplest principle of displacement of liquids mechanically.
The main component of a fluid piston pump is a hollow metal cylinder where all the operating processes connected with the transmission of liquid take place. The piston is used for making a physical impact on the liquid.
The piston metering pumps (these are also called “dosing or dosage pumps”) are equipped with a plunger outlet nozzle and return-spring device. They are the simplest machines and form part of the force controlled-volume pump range.
Pump application areas:
- Oil and gas industry
- Petrochemical industry
- Energy sector
- Food industry and beverage production
- Ceramics industry
- Chemical industry
- Pharmaceuticals industry
Types of supplied pumping equipment:
- Metering pumps in various designs for feeding reagents
- Axial- and radial-piston pump
- Plunger pumps
- Vertical lift pumps.
Screw-type pumps
The principle of operation of such a type of pump is based on the creation of a pressure head of pumped liquid by displacement of the liquid phase by means of one or several helical metal rotors rotating inside a stator of a certain shape.
The pump consists of a screw rotor rotating inside a screw stator. The rotor is manufactured as a high-precision device, and the stator is cast using flexible resilient materials.
The geometry and sizes of these parts allow creating a double chain of leak-proof cavities (cells). When the rotor rotates in the stator, the cells spiral along the axis of the pump without changing either the shape or volume. As a result, the pumping of a product from the suction side to the discharge side of the pump takes place.
Pump application areas:
- Chemical industry
- Mining industry
- Froth floatation and desalinization
- Pumping of abrasive slurry of mine openings
- Dehydration and flocculation
- Processing of minerals and sand
- Construction industry
- Preparation and pumping of ceramic slip
- Other areas with abrasive media and media with high contents of mechanical impurities
Types of supplied pumping equipment:
- Single-screw pumps
- Two-screw pumps
- Multiphase pump
- Three-screw pump
