What we do
- Ecological facilities
- Filters of dust and gas emissions in the industry
- Cyclones
- Dry scrubbers
- Wet scrubbers
- Wet Electrostatic Precipitators
- Dust Collector Controls and Diagnostic Systems
- PulsePro EC
- MikroPulse™ 200EC Expandable Timer / P Controller
- MikroPulse™ 100P
- MikroPulse 100T
- Mikro-Charge™ 200L LeakGauge
- PulsePro Non-Clogging Differential Pressure Transmitter
- Media and related accessories
- Pneumatic Conveying / Pneumatic Dust Control
- Abington High Vacuum Waste Control System
- Vent Line Filter
- Ashing Filter
- Barge Loading Filter
- Dust Hood for Mud Hopper
- Waste Handling Equipment
- Other filters
- Hydrogen and oxygen generating plants
- Manufacturing equipment and technologies
- Monitoring of dust and gas emissions in the industry and urban quality
- Control and measuring instrumentation and automation of industrial processes
- National cluster of industrial zones
- Structure of industrial cluster
- Building of industrial zones
- Building of infrastructure for industrial zones
- European practise and public private partnerships
- Development of industrial manufacturing
- Infrastructure
- Building constructions - commercial and industrial
- Building constructions - offices, hotels and shops
- Buildings constructions - residental and vacational
- Road constructions
- Electrical systems
- Electrical power supply
- Electrical systems low and medium voltage
- Lighting systems
- Voltage switchgears low and medium voltage
- Information systems
- Secutiry alarm systems
- Alarm systems
- Perimeter security
- Fire alarm systems
- CCTV systems
- Access control
- Fire extinguishing systems
- Emergency power supply
- Rechargable batteries
- Building management systems (BMS) and air conditioning
- Energy
- Power transmission / distribution systems
- Fossil power plants / power electrical stations
- Renewable energy / Photovoltaic electrical stations
- Renewable energy / solar power generation
- Waste, water and petroleum treatment
- Additional refininf of waste oil fractions
- Soil remediation of oil
- Separation and recycling of municipality waste
- Waste water treatment plants
- Recycling and re-refining of used oil
- Pipeline infrastructure
- Engineering and design of subsea onshore pipelines, offshore platforms, onshore stationsfor oil and gas processing
- Valves
- Pipelines for oil, gas and water
- Insulation materials - thermo shrinkable tape
- Cathodic protection of pipelines
Gate valve
A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restric¬tion is desired. The gate faces can form a wedge shape or they can be parallel.
Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow.
Typical gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss. Gate valves can have either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited.
Gate valves may have flanged ends which are drilled according to pipeline compatible flange dimensional standards. They are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, alloy steels, and forged steels.
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