Ground Joint or "O" Ring:  Precision Manufactured:

·       Central's ground joint connection provides a long reliable life with a seal which is one of the most widely used in the oil and gas industry.

·       "O" ring unions provide a leak-proof static seal.  They can be removed and reused in the field without replacement or damage to the insulator.

·       Being one of the oldest manufacturers of isolating unions, we have perfected a large variety ranging up to 3000 psi working pressures, and sizes from 1/4 inch to 3 inches. Their dielectric strength go far beyond the toughest requirements.  Also, our delivery is usually from stock, which means added assurance.

Important:

·       Many water heater manufacturers state that their warranties are invalid unless heater tanks are isolated from copper tubing.

Stop Spray Currents!

·       Dielectric unions stop the flow of stray electrical currents which may be picked up from nearby electrical lines or appliance grounding connections.

Prevent Electrolytic and Galvanic Corrosion:

·       Use Central's dielectric unions wherever there is a need to prevent electrolysis or galvanic corrosive action, i.e., when joining dissimilar metals in your piping and plumbing systems. These unions have numerous uses such as:  Water heaters, water storage tanks, gas piping, air conditioning, water conditioners, water pumps, steam lines, plating tanks,  oil piping, fan coil units, cabinet heaters, and finned tube radiation and convectors.

Stop Corrosion from Dissimilar Metals:

·       When two dissimilar metals are joined together in the presence of water, an electric current is formed.  Also the presence of heat can greatly accelerate the flow of electricity and speed up the galvanic corrosion process.  Central's Dielectric Unions solve the problem!

Quality Construction:

·       Central products are carefully engineered and manufactured to perform the function for which they are recommended on our literature.  Our recommendations are based on sound engineering principles supported by laboratory test data, both non-destructive and destructive.  Nevertheless, our products must be properly installed and used in accordance with good judgment and proper training.  While all statements and data offered herein are believed to be accurate and reliable, they are not to be taken as a warranty or representation for which Central Plastics assumes responsibility.  Statements or suggestions concerning possible use of products or procedures are made without representation or warranty that any such use or procedure is free of patent infringement.

·       Ground Joint:  Extra wide seating surface.

·       Precise Mating Tapers:  Provides high compression, gas-tight seal.  Will not loosen under strain or vibration.  (For 3000 lbs:  Brass ring-serves as bearing surface for the nut.  Eliminates possibility of damage to nylon insulation when making-up.)

·       Nut and Body:  Made of high test, air refined malleable iron.   (For 3000 lbs:  Forged steel nut and body-made from hot forged ASI 1023 open hearth, silicon killed forged steel.)

·       Extra-Heavy Shoulder:  On swivel end and in the nut.  Increases strength to withstand pipe strains, vibration, misaligned connections, and wrench abuse.

·       Integral One-Piece Construction:  Insulation is bonded and molded to metal body.  No loose parts to assemble, lose or misalign during field installation.

·       Precision Threading:  Expert matching for exact dimensions.  Meets ANSI B2 1.

·       Molded Nylon:  Non-brittle to withstand extreme shock loads and impact without fracturing. Chemically unaffected by most substances, including gas, water, ammonia, petroleum oils, and greases at temperatures as high as 250°F.  Central's insulation design uses a return to nylon on the internal surface, which gives additional protection against shorts caused by bridging of foreign materials.  Dielectric strength goes far beyond the toughest requirements.

·       Complies with ASTM-A-105.

Specifications, 150 lb Central Plastic Ground Joint Isolating Union:

·       Size: 1 in, 1-1/2 in, 1-1/4 in, 1/2 in,2 in, 3/4 in

·       Working Pressure: 300 lb

Specifications, 3000 lb Central Plastic Ground Joint Isolating Union:

·       Size: 1 in, 1-1/2 in, 1-1/4 in, 1/2 in,1/4 in, 2 in, 3/4 in, 3/8 in

·       Working Pressure: 3000 lb