In short: an open cooling tower exposes the process water to dust, sand and air, so it fouls the equipment it is meant to cool. A closed-circuit tower keeps the process fluid inside a coil and sprays water only on the outside. BTGC supplies Baltimore Aircoil Company closed-circuit towers and adiabatic coolers, built for 50 °C ambient.

Operating in the Kingdom means battling ambient temperatures above 50 °C with air full of dust. A cooling tower is the plant's defence, and the wrong type becomes a maintenance burden: fouled heat exchangers, scaled jacket water circuits and chemical treatment costs that never stop.

Open tower or closed circuit

When to choose an adiabatic cooler

An adiabatic cooler is a dry cooler with a water spray or wetted pad that runs only during the hottest hours. For most of the year it runs dry and uses no water. In the summer peak, the spray brings the air temperature down before it reaches the coil. The BTGC catalogue lists this as the choice for plants where water conservation is a design target.

Baltimore Aircoil Company from BTGC

Baltimore Aircoil Company (BAC) of the USA and Belgium is the global leader in factory-assembled cooling towers and closed-circuit fluid coolers. The range BTGC supplies in the Kingdom covers:

• Series 3000 and Series 1500 crossflow and counterflow cooling towers

• Closed-circuit cooling towers that isolate the process fluid from the atmosphere

• TrilliumSeries adiabatic coolers that run dry in cooler months

Applications in the BTGC catalogue are district cooling plants, refinery process water and HVAC utilities. See our page for Baltimore Aircoil Company in Saudi Arabia and the full thermal management and cooling offer.

Tropicalised for the Kingdom

BAC units for Saudi sites are specified for the real design ambient, with corrosion-resistant construction for coastal air and fill and drift eliminators chosen for dusty conditions. State the design wet-bulb temperature and the site location in every enquiry; a tower sized for a European wet bulb will under-perform here.

BTGC support in Dammam, Jubail and Yanbu

BTGC supports petrochemical, refinery and district cooling customers from three branches, and supplies fill, nozzles, fans, drives and gearboxes as spares. For a quotation send the heat load, fluid, flow, inlet and outlet temperatures, design wet bulb and the site conditions.

Questions buyers ask

Can a closed-circuit tower replace an open one on an existing circuit? Yes, where the heat load and footprint allow; BTGC checks both.

How much water does an adiabatic cooler save? It depends on the site climate; the catalogue describes it as saving massive amounts by running dry outside the peak. BTGC can model the annual water use for the site.

Who services the towers? BTGC supplies spares and can arrange inspection and refurbishment through the Jubail service center and field teams.

Contact BTGC

Email info@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.

In short: a plate exchanger wins on size, efficiency and cleaning for liquid-to-liquid duties; shell and tube wins on pressure, temperature and dirty or phase-change service; an air fin cooler wins where water is scarce. BTGC supplies all three from Kelvion.

Heat transfer sets plant profitability. An exchanger that fouls, leaks or under-performs costs energy every hour and production at every cleaning. The choice between the three main types is made at the specification stage, and it is worth getting right.

The three types compared

Saudi conditions change the answer

• Seawater cooling. Titanium plates or tubes resist Gulf seawater; the plate exchanger's small size suits coastal plants.

• Scarce water inland. Air fin coolers remove the water requirement, at the price of a larger footprint and lower performance on the hottest afternoons.

• High ambient. An air cooler sized for 40 °C under-performs at 50 °C; state the design ambient in the enquiry.

• Dust. Air-side fouling needs a cleaning schedule and, on critical units, a wash system.

Kelvion from BTGC

Kelvion Holding GmbH of Germany, formerly GEA Heat Exchangers, offers one of the world's largest portfolios of heat transfer technology. The range BTGC supplies in the Kingdom covers:

• Gasketed, brazed and fully welded plate heat exchangers

• Air fin coolers for refineries and gas plants where water is scarce

• Shell and tube exchangers for high-pressure and critical process duties

Applications in the BTGC catalogue are oil and gas processing, power plant condensers and marine cooling. See our page for Kelvion in Saudi Arabia and the full thermal management and cooling offer.

Spares and retubing

Most heat exchanger enquiries BTGC receives are for plates, gaskets, tube bundles and retubing rather than new units. BTGC supplies genuine plates and gaskets, and manages bundle replacement as a turnaround package with pre-shutdown inspection and kitting by tag number.

BTGC support in Dammam, Jubail and Yanbu

BTGC supports petrochemical and oil and gas plants from three branches. For a quotation send the duty: both fluids, flow rates, inlet and outlet temperatures, allowable pressure drops, design pressure and temperature, and the fouling allowance.

Questions buyers ask

Can a plate exchanger replace a shell and tube unit? Often, for liquid-to-liquid duty within the gasket limits, and it saves space and energy. Not for high-pressure or condensing duty.

What about Hemaco for shell and tube? BTGC also supplies Hemaco engineered TEMA exchangers, built to order in carbon steel, stainless and exotic alloys.

How fast are plates and gaskets available? Common sizes are stocked or on short lead time; send the plate pattern and gasket material.

Contact BTGC

Email info@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.

In short: sulfuric and hydrochloric acid attack most metals, and exotic alloys are expensive and still not immune. A valve lined with PFA or PTFE puts an inert plastic between the acid and the steel. BTGC supplies Crane ChemPharma & Energy lined ball, butterfly and check valves, with local assembly in Dammam.

Acid plants, chlor-alkali units and chemical distribution networks in Jubail and Yanbu handle fluids that corrode carbon steel in days and stainless steel in months. The choice for the valve engineer is between an exotic alloy body, which costs several times a steel valve, and a steel valve lined with a fluoropolymer.

How a lined valve works

The body is cast steel or ductile iron for strength. Every wetted surface is covered with a thick, bonded layer of PFA or PTFE. The acid never touches the metal. The lining is moulded, not sprayed, so it has no pinholes and extends through the flange faces to seal against the pipe lining.

Where a lined valve is the wrong choice

• Temperatures above the lining limit, around 200 °C for PFA

• Vacuum service that can pull the lining away from the body, unless the valve is vacuum-rated

• Abrasive slurries that cut the lining; a Saunders diaphragm valve with a rubber lining suits those

• Full-bore, high-pressure pipeline duty, where a metal-seated ball valve is the answer

Crane ChemPharma & Energy from BTGC

Crane ChemPharma & Energy is a portfolio of engineered valve brands for chemical and energy service, with strong local support in Saudi Arabia. The range BTGC supplies in the Kingdom covers:

• PFA and PTFE lined ball and butterfly valves for corrosive acids and chlor-alkali

• Xomox sleeved plug valves, cavity-free, for polymer units and fouling media

• Saunders diaphragm valves, industrial and aseptic, for slurries and high-purity service

• High-performance butterfly and check valves for utility and process lines

Crane assembles and tests process valves locally in Dammam, which shortens lead times and supports local content targets. See our page for Crane valves in Saudi Arabia and the full industrial valves offer.

Stocking in Jubail

BTGC holds PFA-lined valves and spares in Jubail for the petrochemical complexes nearby, so a failed valve on an acid line can be replaced without waiting for an import. Ask for the current stock list by size and class.

BTGC support in Dammam, Jubail and Yanbu

BTGC supports the petrochemical plants of Jubail and Yanbu from branches in both cities, with the valve test center in Jubail. For a quotation send the fluid and concentration, temperature, pressure, line size and the pipe lining material.

Questions buyers ask

PFA or PTFE? PFA is moulded and handles higher temperature; PTFE is the economical choice for moderate duty. BTGC selects by fluid and temperature.

How is the lining inspected? By spark testing for pinholes before shipment; test certificates are supplied.

Can lined valves be repaired? Liners are replaced as a unit; BTGC advises when replacement is cheaper.

Contact the BTGC valve team

Email valves@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.

In short: cavitation happens when the pressure inside a control valve falls below the liquid’s vapor pressure and the vapor bubbles collapse on the metal. The fix is a valve sized for the pressure drop, with staged trim and hard materials. BTGC supplies Motoyama Eng. Works, Ltd. severe service valves from Dammam, Jubail and Yanbu, and repairs valves in Jubail.

Control valve cavitation is one of the most common reasons a liquid control valve fails early. It shows up as noise, vibration and a damaged plug and seat, often within months of start-up. This guide explains what causes it, how to recognise it, and which valve designs stop it in refineries, petrochemical plants and utilities across the Kingdom.

What causes control valve cavitation

A control valve reduces pressure by forcing liquid through a narrow opening. At that point the liquid speeds up and its pressure falls sharply. If the pressure falls below the liquid's vapor pressure, vapor bubbles form. Downstream of the opening the pressure recovers, and the bubbles collapse against the metal.

Each collapse is small. Millions of them erode the plug, the seat and the valve body. The higher the pressure drop across the valve, the more severe the damage.

Cavitation is different from flashing. In flashing, the outlet pressure stays below the vapor pressure, so the bubbles do not collapse and the liquid leaves the valve partly as vapor. The two problems need different fixes, so it matters which one you have.

How to recognise it in the plant

Maintenance teams usually notice cavitation before they measure it. The common signs are:

• A noise like gravel passing through the pipe
• Vibration in the valve and the downstream piping
• A rough, pitted surface on the plug and seat when the valve is opened
• Unstable control at low valve openings
• Leakage through the seat soon after a repair

The services where it appears most often are those with a high pressure drop in liquid:

How to stop it

The lasting fix is to choose a valve built for the pressure drop, not to keep replacing trim.

1. Stage the pressure drop. Multi-stage and cage-guided trims take the drop in several small steps, so the pressure never falls below the vapor pressure.
2. Choose harder trim materials. Hardened trim resists the erosion that remains.
3. Check the sizing. An oversized valve works almost closed, where cavitation is worst.
4. Review the installation. More back-pressure downstream, or two valves in series, lowers the drop across each one.

Valve sizing and noise prediction follow IEC 60534, the international standard for industrial control valves. Ask for the sizing calculation with every offer.

Motoyama control valves for severe service

Motoyama Eng. Works, Ltd. of Japan builds globe control valves for exactly this duty. The range that BTGC supplies in the Kingdom includes:

• Heavy-duty globe control valves, cage-guided and top-guided, for precise throttling in severe service
• Trim designed to prevent cavitation at the high pressure drops found in hydrocracking and fractionation units
• Bellows seal valves for toxic and lethal media
• Cryogenic valves with extended bonnets for service down to -196 °C
• Safety relief valves for over-pressure protection

See the full range on our page for Motoyama control valves in Saudi Arabia, or browse all industrial valves for Saudi plants.

BTGC support in Dammam, Jubail and Yanbu

BTGC has served Saudi industry since 1996 and is the Motoyama Eng. Works, Ltd. partner in the Kingdom. We support oil and gas plants, petrochemical complexes and utilities from three branches, in Dammam, Jubail and Yanbu.

Our service center in Jubail carries out valve testing and repair in Jubail, including inspection, seat machining and pressure testing. The same center is the WEG approved service center in Saudi Arabia and offers full electric motor services: rewinding, overhaul, dynamic balancing and load testing. If a valve is already damaged, we can inspect it, report the cause and offer either a repair or a replacement.

To size a replacement valve, send us:

• The fluid, and its temperature and vapor pressure
• Inlet and outlet pressure at minimum, normal and maximum flow
• Line size and pressure rating
• The existing valve datasheet or tag number
• A short description of the problem

Questions buyers ask

Contact the BTGC valve team

Email valves@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote and attach your datasheet.