National Grid had contracted us to install a new gas boiler system feeding hot water to a heat exchanger used to pre-heat incoming natural gas at one of their high-pressure gas facilities in Staten Island. The sizing of the system, design of pumps, valves and controls were performed by Ken Jr.

The system shown to the right provides over 1 million BTU/Hr in total to pre-heat incoming natural gas before it can enter pressue regulators. Each boiler alone is capable of handling 70% of the total peak required heating capacity.

Aspects of this installation include:

• 4" sollid, reinforced concrete boiler base.
  
  
• 100% back-up redundancy on all controls and mechanics including two near boiler pumps, two primary loop pumps, two secondary loop pumps.

• Hard-wired natural gas detection switches to shut down all equipment in the unlikely event of an emergency.
  
  
• Highly sensitive, accurate mixing valve to deliver proper water temperatures to the heat exchanger for pinpoint accuracy of gas temperature..
  
  
• High-efficiency Tekmar reset controller to regulate boiler temperature during low gas demand periods when less heat is needed.
  
  
• More efficient use of space, allowing National Grid service personnel plenty of working room for service and annual maintenance of boilers and pumps.