Dimensional Enlargement

Choose 4 ½" or 6" Gages, both with triple coil spiral/helical wound Bourdon tube to provide dependable service. ASME Grade A, 2A or 3A accuracy is built in for life. Spirahelic Bourdon tube design eliminates gears, springs, linkages and complex movements which can wear and cause inaccuracy or early failure. Direct drive of lightweight, precision balanced pointer reduces friction and mass, improving responsiveness and accuracy. Units resist shock and vibration which would quickly ruin conventional "C" tube gages and avoids the need for expensive and leaky liquid filled gages.

Center post bearing carrier ensures precise bearing alignment for nearly friction free operation. Low volume Bourdon tube reduces fluid volume and stored energy, reducing potential for damage if tube ruptures from overpressure or other causes. Large area filter plug keeps dirt out and restricts flow from damaged Bourdon tube. "Throttling" feature of small diameter tubing combines with solid front and rear blowout features for exceptional safety. Brass or 316 stainless steel connection block has both bottom and back openings. Impact resistant plastic case is sized to conform to ASME B40.1, replacing existing gages without changes in panel cutout or mounting holes.

For applications requiring both an analog gage and remote signal transmission, choose the Series 7116 Spirahelic Pressure Indicating Transmitter. It adds a versatile 4-20 mA DC; 2, 3 or 4 wire output signal to the ASME Grade 2A accuracy of the 7112 models. Span and zero controls included.

PHYSICAL DATA
Size: 4 1/2" 7100) or 6" 7200) - design conforms to ASME B40.1.
Accuracy:Model 7100-ASME Grade A (1% middle half, 2% first and last quarters). Models 7112, 7116-ASME Grade 2A (1/2% of full scale). Model 7114A, 7214A-ASME Grade 3A (1/4% of full scale).
Pressure Connection: 1/4" NPT female, duplicated back and bottom.
Wetted Parts: Model 7100 - Beryllium copper Bourdon tube, nickel plated brass connection block. Models 7112, 7114A, 7116, 7214A - Inconel X-750 Bourdon tube, 316 SS connection block.
Housing: Impact resistant, mineral filled nylon.
Calibration: Vertical mounting standard.
Movement Direct drive of pointer.
Overpressure: 150% of full scale. Recommended operation should be between 25% and 75% of full scale.
Temperature Limits: -20 to 130°F (-29 to 54°C).
Finish: Black Weight 18 oz. 7100); 26 oz. 7200).
Standard Accessory: (1) 1/4" NPT plug, brass or stainless steel.
Optional Accessory: No. A-341 Brass Adapter. 1/4" NPTxG 1/2 A (per ISO 228/1) parallel thread.

MODEL RANGE CHART - 4 1/2" GAGES