Custom Cooling Solutions

• Custom Engineering
• Custom Layout and Design
• Individual System Calculations
• Horizontal or Vertical Pumping Units
• Redundant Pumping Units
• Multi-plate Heat Exchanger
• Temperature Gauge
• Water Level Indicator
• Flow Indicator
• Optional Monitoring and Alarm System

National Oilwell Varco engineers and custom manufactures quality brake, clutch and winch cooling systems. These systems can be equipped with horizontal or vertical pumping units and various tank designs to meet virtually any footprint requirement. National Oilwell Varco cooling systems are engineered to fully dissipate heat generated at 100% loads and offer redundant pumping units to ensure system availability.

A multi-plate heat exchanger equipped with titanium plate sets provides the ability to precisely match the cooling capacity to the maximum heat load. The heat exchanger can be opened and each plate cleaned individually to prevent scaling and remove any foreign contaminants. If a plate is damaged, the damaged plate and its mate can be removed and the heat exchanger reassembled with minimum cooling capacity loss. If the environment changes, the cooling rate of the exchanger can be increased by adding additional plate sets. Included are 2½" pressure gauges on the inlet and the outlet of the heat exchanger to monitor pressure through the exchanger. National Oilwell Varco systems are available with single or redundant heat exchangers.

These units are equipped with 2500 Supremeâ„¢ or Magnumâ„¢ centrifugal pumps with tungsten carbide mechanical seals. Pumps and motors are mounted on a common base and coupled with a flexible coupling that is protected by an OSHA style guard. The units are primed prior to assembly and then coated with an enamel top coat. The bases and guards are available as hot-dipped galvanized for applications in harsh environments. Check valves in each pump-discharge line allow all butterfly valves to remain open and either pump to be activated without water pumping back through the second pump. The two pumps are piped to allow 100% pump standby. Bypass piping is incorporated into the system to allow bypass of the heat exchanger during cleaning and maintenance operations.

These systems feature a closed steel tank with water level indicator, drain and removable top. The tank features a 2-inch fill connection, 8-inch atmospheric vent and a 6-inch, 150-pound ANSI flange return connection. The tank interior is coated with epoxy-based paint to prevent corrosion. A 3" temperature gauge is mounted on the tank exterior to allow local monitoring.

All equipment is mounted on a common heavy I beam oilfield type skid with four lifting eyes. The skid is deck-plated and seal-welded prior to coating.

Optional Monitoring and Alarm System

National Oilwell Varco offers optional monitoring instrumentation. This safety equipment can be fully integrated into the package, including wiring. The safety protection package is available with the following equipment:

Explosion Proof Indicator Control Panel
This panel has three green lights, three red lights, and an on/off switch. The green or red lights indicate temperature, water level, and flow. Panel is wired to instrumentation and mounted on the system skid.

Explosion Proof Temperature Gauge
This gauge reads temperature on the face and can be set in the field to send a signal to the control panel when the fluid reaches the specified temperature.

Explosion Proof Low-Level Alarm
The low-level alarm sends a signal to the control panel when the water level drops to level setting.

Explosion Proof Flow Indicator
The indicator is mounted in the discharge piping with a paddle in the flow stream. When the pump is activated the flowing liquid activates the paddle switch and transmits a signal indicating fluid flow. No flow will trigger the alarm at the control panel.

Explosion Proof Horn
This horn provides a sonic warning when any of the three alarms are triggered. Horn can be silenced at the control panel.

Explosion Proof Strobe Light
The strobe light provides a visual warning when any of the three alarms are triggered. This single-flash, explosion-proof, UL listed strobe light is designed for operation in hazardous areas rated Class I Groups C & D, Class II Groups E, F & G. Design features include: a housing made of die-cast, high-strength, copper-free aluminum alloy coated with a baked-powder epoxy finish, stainless steel hardware and an o-ring-sealed, pre-stressed, glass globe with glass and guard, and double-pitched ACME threads that provide smooth assembly.