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DuraGauge© Pressure Gauge Type 1279, Grade 2A (±0.5%)

Type 1279 Duragauge© pressure gauge (4½" dial size only) Standard stainless steel rotary geared movement with Teflon coated gears and bearings Easily adjustable, self-locking micrometer pointer 100 standard psi and metric ranges, five standard systems

The solid-front Ashcroft© phenolic case gauge is truly and industry first. Offered in 4½" size only, weatherproof, hermetically sealed or liquidfilled versions. The weatherproof gauge is easily field converted to a hermetically sealed or liquid-filled gauge with a special kit. Fill Kit 1280. Molded threads at the front and rear of the case provide axial seals with the use of threaded rings. The ring is glassfilled polypropylene. In the weatherproof version, the pressure relief back is polypropylene, fastened with stainless steel screws. Click here for Bourdon System Selection Click here to create part number

DuraGauge© Pressure Gauge Type 1377, Grade 2A (±0.5%)

Type 1377 Duragauge© pressure gauge (4½",6",8½" dial sizes) Standard stainless steel rotary geared movement with Teflon coated gears and bearings Easily adjustable, self-locking micrometer pointer 100 standard psi and metric ranges, five standard systems

Designed for flush mounting, this solid-front gauge is ideal for panel board applications. Its black epoxy coating and its tough aluminum weatherproof case easily allow application in a variety of climatic conditions. Click here for Bourdon System Selection Click here to create part number

DuraGauge© Pressure Gauge Type 1379, Grade 2A (±0.5%)

Type 1379 Duragauge© pressure gauge (4½",6",8½" dial sizes) Standard stainless steel rotary geared movement with Teflon coated gears and bearings Easily adjustable, self-locking micrometer pointer 100 standard psi and metric ranges, five standard systems

This rugged, solid-front aluminum case gauge is tops in its field. It is available as a weatherproof hermetically sealed or liquid-filled version in 4½" and 6" sizes in pressures to 30,000 psi. Like the 1279, it can be easily field converted from the weatherproof version to either the sealed or liquid-filled version using an optional kit. Ranges 50,000, 80,000 and 100,000 psi are available in 6" hermetically sealed and liquid-filled cases. All size cases are coated with black epoxy which will withstand most environmental conditions. Click here for Bourdon System Selection Click here to create part number

DuraGauge© Pressure Gauge Type 2462, Grade 2A (±0.5%)

Type 2462 Duragauge© pressure gauge (4½",6",8½" dial sizes) Standard stainless steel rotary geared movement with Teflon coated gears and bearings Easily adjustable, self-locking micrometer pointer 100 standard psi and metric ranges, five standard systems

This solid-front gauge is designed for greater readability by using a large 6" dial and a durable 4½" system. Viewed from the front, it appears to be a 6" gauge. Its glass-filled polypropylene case is highly impact resistant and holds up well in most environments. This general-purpose gauge offers truly functional styling and economy. The result is a gauge that will fit most applications at a price that represents outstanding value. Click here for Bourdon System Selection Click here to create part number

BOURDON SYSTEM SELECTION
Ordering Code	Burdon Tube & Tip material(1) (all joints TIG welded except "A")	Socket Material	Tube Type	Range Selection Limits	NPT Conn.(2)
A	Grade A Phosphor Bronze Tube-Brass Tip, Silver Brazed	Brass	C-Tube	12/1000	½
B	4130 alloy steel	1019 steel	C-Tube	15/1500	½
			Helical	2000/5000	½
R	316 stainless steel	1019 steel	C-Tube	12/1500	½
			Helical	2000/20000	½
S	316 stainless steel	316 stainless steel	C-Tube	12/1500	½
			Helical	2000/20000	½
P(3)	K Monel	Monel 400	C-Tube	15/1500	½
			Helical	2000/30000	½(4)
WW(5) (6)	Inconel 718	316 stainless steel	Helical	50/80/100,000	¼ high press

For selection of the correct bourdon system material, see the media application table Optional connections available: ¼ NPT where ½ NPT is standard Use for applications where NACE standard MR-01-75 is specified 30,000 psi range supplied with ¼ high pressure connection, ½ NPT optional 50,000-100,000 psi available in 6" 1379 lower and back connection only. Offered hermetically sealed as standard. Liquid fillable optional.

PART NUMBER FOR A DURAGAUGE:
Select:	45	1279	RS*	04L	XXX	0/200 psi
	Dial Size - 4½"	Case Type - 1279 Ring-threaded reinforced polypropylene	Bourdon system selection ordering code	Connection ¼NPT (02), ½NPT (04), Lower (L), Back (B)	Optional Features Click here for common Options	Standard Pressure Range Click here for common Pressure Ranges
* "S" denotes solid front case design

WARNING: Pressure gauges should be selected by considering media and ambient operating conditions to prevent misapplication. Improper application can be detrimental to the gauge, causing failure and possible personal injury or property damage. The information contained in this catalog is offers as a guide to assist in making the proper selection of a pressure gauge. Additional information is available from PSI. Pressure Ranges: Select a gauge with a full-scale pressure range of approximately twice the normal operating pressure. The maximum operating pressure should not exceed 75% of the full-scale range. Failure to select a gauge within these criteria may ultimately result in fatigue failure of the bourdon tube. Operating Conditions: The temperature level to which a gauge will be subjected must be considered. Accuracy will be affected approximately 1.5% per 100°F. Gauges with welded joints will withstand 750°F, with silver brazed joints, 450°F, and soft-soldered joints, 150°F for short times without rupture, although other parts of the gauge may be destroyed and calibration lost.

Cases: Many styles and different materials are offered. Two types are available: open and solid front. Solid front cases have a solid wall between the bourdon tube and the window. Open front cases have the dial between the bourdon tube and the window. Rings: The ring, which retains the window, is threaded, bayonet (cam), friction, snap-on or hinged, depending upon case type. Pressure Elements: Available in a wide variety of materials, including: brass, phosphor bronze, alloy steel, 316 stainless steel, Monel and Inconel. Proper selection of the bourdon system or bellows material depends upon the process fluid to which the system will be subjected. If the correct material is not available, the use of a diaphragm seal may be necessary to protect the system from the process fluid. If the gauge is subject to severe vibration or pressure pulsation, a liquid filled gauge is recommended. Movements: Movements are designed and materials of construction selected to reduce friction and extend wear life. For example, Commercial Gauges have a unique spring-suspended

brass movement with polyester segment, whereas the Duragauge® gauge stainless steel movement is a rotary geared design with Teflon-coated wear parts. Other movements are stainless steel with bronze pinion and segment or bronze bushed. Dials: Dials are uniformly graduated and have highly legible black markings. White coated or brushed aluminum backgrounds are available. Windows: The standard is glass or plastic depending on the type of the gauge. Options are: laminated safety glass, nonglare glass, or plastic, depending on the type of gauge. Pointers: Duragauge pressure gauges have micrometer adjustable pointers which can be repositioned without removal. Type 1009 gauges have adjustable pointers. Many other gauges are supplied with nonadjustable pointers which can be reset by removing the ring, and removing and resetting the pointer. Adjustable pointers are available as an option on these gauges.

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