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Blog Flow Switches & Indicators

283 - 2014

ITT Barton Model 318, 318A, 318C

The ITT Barton Models 318, 318A, 318C are 4 1/2" differential pressure switches which are approved by the conditions required by the specifications of MIL-S-901C Shock Grade A and MIL-STD-167 Vibration.

The scale of the ITT Barton Model 318, 318A, 318C can be graduated uniformly for measurement of differential pressure or liquid level, or square root for measuring flow rates. These switches are used by the US Navy mostly.

Housings and Safe Working Pressures of the ITT Barton Models 318, 318A, 318C:
Forged brass, SWP 500 PSI(34.5) bar
Brass, SWP 1000 PSI(68.9 bar)
CR Steel , SWP's 1500, 3000, & 6000 PSI(103.4 , 206.9, &413.8 bar)
316 Stainless Steel, SWP's 500 ,1500, 3000, 6000 PSI(34.5, 104, 207, 414 bar)
Cast Aluminum, SWP 400 PSI(27.6 bar)
Alloy Steel , SWP 10000 PSI(690 bar)

Bellows Material:
316 Stainless Steel
Beryllium Copper
Inconel

DP Ranges:
0-30"w.c. to 0-1000 PSID
(0-762 mm to 0-69 bar)

Accuracy (DP Range):
Repeatability: .25%

Temperature Limits:
-40 F (-40 C) to + 180 F (+80 C)

283 - 2014

ITT Barton Model 274A, 335A, 335P, 335T and 338E

ITT Barton Model 274A, 335A, 335P, 335T and 338E are pneumatic instruments. The consists of the  product line of Pneumatic Transmitters and Indicating or Recording Controllers. All ITT Barton 274A, 335A, 335P, 335T and 338E models are designed to meet the most stringent and demanding requirements for Oil & Gas Production, U.S. Navy Shipboard, and Process Plant applications.

The heart of the DP-driven instruments is the rugged ITT Barton Differential Pressure Unit (DPU) – featuring a time-proven liquid-filled bellows and torque tube design. Recording
and Controlling models are also available with Pressure or Temperature actuators.


Pneumatic Transmitters (Standard DP and Linear-with-Flow)
• Models 274A - DP Transmitters
• Actuated by Barton’s M199
• Rugged, Weatherproof, Non-corrosive Case
• Continuous Purging (pilot valve and nozzle exhaust inside)
• Operation Span Continuously Adjustable (100 - 20%)
• Adjustable Suppression (up to 80% of range)
• Large Valve Relays (no need for secondary booster)
• Span Continuously Adjustable (down to 20% of range)
• Air Consumption (at balance condition) 0.05 scfm max.

Actuating Units:
Barton® Pneumatic Transmitters are actuated by the M199
Differential Pressure Unit (DPU) which is also available in a
NACE certified version.

Cases
:
Barton® Pneumatic Transmitters are housed in a rugged, weatherproof case especially suited for use in corrosive fume environments. Since the pilot valve and nozzle exhaust
inside the case, continuous purging is achieved.

Transmitting Unit:
Changes in DP are transmitted mechanically to the flapper, which covers a small constant-feed nozzle. Any change in the position of the flapper will instantly change the nozzle pressure, which in turn controls the action of the 2-valve balanced relay to increase or decrease the output air pressure. A calibrated bellows assembly actuated by the output pressure serves to reposition the flapper mechanism and restore a state of equilibrium - in this manner, output air pressure varies in direct relation to the differential pressure applied to the instrument, or in direct proportion to the flow-rate. The relay is not affected by changes in output pressure and this makes it possible to maintain practically constant nozzle pressure at any output pressure.

Operating Span/Suppression (Linear-with-DP units only)
The operating span is continuously adjustable from 100- 20% of the DP range. Thus a unit with a differential pressure range of 0-100" w.c. can be adjusted to provide a 3-15 PSI (207 mbar-1 bar) output signal (direct or reverse) for any span from 0-20" w.c. to 0-100" w.c. (0-50 mbar to 0-248 mbar) range. The operating span can be shifted anywhere within the range of the differential pressure unit

283 - 2014

ITT Barton Model 351, 352 and 353

The ITT Barton Model 351, 352 and 353 Liquid Level System provides accurate hydraulic transmission of a process medium for measuring the level of liquids contained in a process vessel. The self-contained system of the ITT Barton 351, 352 and 353 models is typically mounted outside the vessel. Floats, levers, pins, and other mechanical devices susceptible to contamination or wear are not required. Because the basic system is actuated by the process media, local indication is possible without external power. ITT Barton Liquid Level Sensors can be purchased as a component of a factorybuilt system, or as a part for a field-installed system. Sealed sensor systems can be designed in the following configurations:

• a single sensor system (ITT Barton Model 351)
• a dual-sensor system (ITT Barton Model 352)

ITT Barton Model 351 Liquid Level System
The Model 351 consists of a single reference sensor connected by capillary tubing to a Barton Differential Pressure Unit (DPU). Hydraulic fluid is sealed inside the sensor and the capillary tubing, eliminating the need for additional piping.

ITT Barton Model 352 Liquid Level System
The Model 352 consists of two reference sensors connected by capillary tubing to a Barton DPU.

For applications involving corrosive fluids or tank temperatures above 200°F (95°C), a dual-sensor configuration is recommended. For applications involving unusual fill requirements due to liquid volumes or high ambient temperatures, a Model 353 system is recommended. The ITT Barton Model 353 system can be designed with one or two sensors.

273 - 2014

ITT Barton Model 227

   
The Barton Model 227 is a 6" differential pressure indicator. The 227 model is widely used in jet engine and missile testing programs, aircraft ground support equipment, water treatment processes and airconditioning systems. Commonly used and recommended for liquid level indication of materials such as LOX, helium, hydrogen, nitrogen, CO2, and argon.

Housings and Safe Working Pressures:
Forged brass, SWP 500 PSI (34.5) bar
Brass, SWP 1000 PSI.(68.9 bar)           
CR Steel , SWP's 1500, 3000, & 6000 PSI.(103.4 , 206.9, &413.8 bar)
316 Stainless Steel, SWP's 500, 1500, 3000, 6000 PSI. (34.5, 104, 207, 414 bar)
Cast Aluminum, SWP 400 PSI. (27.6 bar)
Alloy Steel , SWP 10000 PSI. (690 bar)

Bellows Material:
316 Stainless Stee
Beryllium Copper
Inconel

DP Ranges:
0-30"w.c. to 0-1000 PSID
(0-762 mm to 0-69 bar)

Accuracy (DP Range)
Ranges from 0-30" (760mm) w.c. to 150 PSI (10 bar) +/- 1/2%
Ranges from 0-150 PSI (10 bar to 600 PSI (40 bar) +/- 3/4%

Temperature Limits:
-40 F (-40 C) to + 180 F (+80 C)

273 - 2014

ITT Barton Model 247

The Barton Model 247 bellows within the DPU move in response to changes in the differential pressure measured at the primary device installed in the process system. Movement of the bellows of the Barton model 247 is mechanically transferred to the indicator mechanism which in turn positions the indicator pointer.

Changes in pressure within the Differential Pressure Unit pressure housings cause the DPU bellows of the Barton model 2477 to move in the direction of the decreasing pressure. Movement of the bellows of de Barton 247 model is transferred to the DPU torque tuube output shaft. The Torque tube shaft is the mechanical output of the DPU which is attached to the back of the indicator case. The torque tube shaft is connected to the indicator mechanism.

The DPU torque tube shaft is connected to the drive arm of the indicator mechanism. The torque tube shaft rotates in response to DPU bellows movement and this rotation is mechanically transmitted through the drive arm and associated mechnism to position the pointer on the scale to the indication relative to the differential pressure measured by the DPU. 

273 - 2014

ITT Barton Model 251 and 251C

The ITT Barton Model 251 and s51C differential pressure indicating switch used to energize alarm or control circuits at preset values of differential pressure, amount of flow or liquid level. This unit has been tested and succesfully passed all requirements of MIL-S-901C, Grade A and MIL-STD-167 Vibration.

Housing and safe working pressures:

273 - 2014

ITT Barton Models 273, 274, 284 and 285

The ITT Barton Models 273, 274, 284 and 285 offer in one package a linear with Flow pneumatic transmitters. The Barton Models 273, 274, 284 and 285 are instruments that mechanically extracts the square root of differential pressure and provides a pneumatic output signal that is proportional to the rate of flow. Models 273 &284 are actuated by the model 224 or 224C DPU. Models 274 & 285 are actuated by the model 199 DPU.     
        
Pneumatic Transmitters are designed to meet the demands of maximum flexibility and service with a minimum of maintenance costs for petroleum, production, navy shipboard and process
plant applications. Connection types vary depending on specs.
   
General features of ITT Barton Models 273, 274A, 284A and 285 include:

• Rugged, weatherproof, non corrosive case
• Continuous purging (pilot valve and nozzle exhaust inside)
• Operation span continuously adjustable (100 – 20%)
• Adjustable suppression (up to 80% of range)
• Large valve relays (no need for secondary booster)
• Span continuously adjustable (down to 20% of range)
• Air consumption (at balance condition) 0.05scfm ma

273 - 2014

ITT Barton MODELS 288A/288C/290D

The weatherproof Models 288A, 288C, and the explosion-proof Model 290D of ITT Barton are DP Indicating Switches. The 288A and 288C have a NEMA-4 watertight die-cast aluminum case (finished with a weather-resistant black epoxy resin paint). The cover lens is secured in the bezel with an elastomer ring to reduce the possibility of accidental breakage. This ring also acts as a seal between the bezel and the case to ensure a moisture, fume and dust-free atmosphere for the indicator and switch mechanism. ITT Barton Model 290D has an explosion-proof case that is certified for Class I, Division 1, Groups B, C & D service. The large cover lens allows maximum readability of the indicating pointer.

Rotation of DPU torque tube shaft of the ITT Barton MODELS 288A/288C/290D is coupled through connecting linkage within the switch case to move the pointer across the scale plate. An actuating cam, directly connected to torque tube shaft, rotates with the motion of the shaft. Two cam follower roller/actuator arm assemblies, one for each switch, respond to torque tube rotation by opening and closing the switches as they ride on and off the cam. The levels of DP at which the switches actuate are adjustable with high and low alarm switch adjustments on the scale plate.

ITT Barton MODELS 288A/288C/290D can have one or two alarm switches. Each switch can be connected to operate normally-opened or normally-closed. The direct-set switch contacts are adjustable over a scale range of 5-95% nominal.

273 - 2014

ITT Barton Model 289A and 291B

The Barton weatherproof Model 289A and the explosion-proof Model 291B are differential pressure indicating switches (Figure 1-1). The 289A has a NEMA-4 watertight die-cast aluminum case (finished with a weather-resistant black epoxy resin paint). The cover lens is secured in the bezel with an elastomer ring to reduce the possibility of accidental breakage. This ring also acts as a seal between the bezel and the case to ensure a moisture, fume and dust-free atmosphere for the indicator and switch mechanism.

ITT Barton Model 291B has an explosion-proof case that is certified for Class I, Division 1, Groups B, C & D service. The large cover lens allows maximum readability of the indicating pointer.

Switches and all adjustments are readily accessible when the cover is removed. The built-in switches energize either single or dual alarm circuits when the measured differential pressures exceed predetermined limits. These limits may be either maximum, minimum, or both.

263 - 2014

ITT Barton Model 199

The Barton Model 199 Differential Pressure Unit (DPU) is a mechanical device which accurately measures differential pressure relative to a gas or liquid flowing through a process system, or to the level of a liquid contained in a process vessel. For process flow measurements, the DPU of the Barton model 199 is connected across a primary device (a venturi, an orifice plate or a flow tube) located in the process system. For liquid level measurements, the DPU may be connected in a variety of ways to measure the difference in pressure caused by variations in the level of the liquid in the process vessel.

The Barton Model 199 DPU is a dual bellows assembly enclosed within pressure housings. The dual bellows assembly consists of two opposing internally connected liq-Venting uid-filled bellows, a center plate, Connection range springs, overrange valves, Torque Tube and a torque tube assembly. Shaft The pressure housings are connected by Pipe or tubing to the primary device located in the sys-Mounting tem piping. Variations in differen-Bracket tial pressure within the pressure housings cause the bellows to expand or contract in a linear direction towards the side having the lowest pressure. The linear movement of the bellows is converted into angular rotation when transmitted to the torque tube shaft by the drive arm and this mechanical motion actuates the mechanism of the process monitoring instrument. The process monitoring instrument that is connected to the torque tube assembly may be an indicator, a switch, a transmitter, a recorder, or other process control device.

263 - 2014

ITT Barton Model 200

BARTON model 200 differential pressure indicators are available for a variety of safe working pressures and differential pressure ranges. The Barton model 200 are widely used for the measurement of differential pressure, flow rate and liquid level applications.

Features

• BARTON differential pressure unit (DPU) sensor
• NEMA-4/IP65 cases
• Wide selection of differential pressure ranges
• Pulsation dampening

Actuating Units
• The indicator is actuated by a rupture-proof bellows DPU with integral temperature compensation.
• The M199 DPU features dual, liquid-filled bellows designed to withstand repeated overranges equal to the safe working pressure of the housings without a change in calibration.

Indicating Mechanism
• The indicating pointer traverses a 270-degree arc, providing excellent readability. It is driven by a precision-jeweled rotary movement that multiplies rotation of the torque tube through a gear and pinion to the pointer. The movement employs a thermally stable Ni-Span-C hair spring.
• The movement has a micrometer screw for convenient range adjustments. Zero/range adjustments can be made without removing the scale plate or pointer. Linearity adjustments are readily accessible after removal of the scale plate.

Cases
• BARTON indicators are available in 6” (152 mm) dial size. The standard case is die-cast aluminum with a special baked epoxy black finish, which is NEMA-4/IP65 rated. An optional
“S” version 316 stainless steel case is available for offshore/corrosive environments.

Scales
• All indicating scales can be graduated uniformly for measurement of differential pressure, liquid level or square root for direct reading of flow rate. Special scales can be furnished for indicating liquid level in horizontal or non-uniform tanks. Scales are available in
black with white lettering (standard) and in white with black lettering (optional).

263 - 2014

ITT Barton Model 224

The Barton Model 224/224C Differential Pressure Unit (DPU) is a mechanical device that measures differential pressure relative to a gas or liquid flowing through a process system, or to the level of a liquid contained in a process vessel. For process flow measurements, the DPU is connected across a primary device (e.g., venturi, orifice plate, or flow tube) located in the process system. For liquid level measurements, the DPU may be connected in a variety of ways to measure the difference in pressure caused by variations in the level of the liquid in the process vessel.

Product Description
The Model 224/224C DPU is a dual bellows assembly enclosed within pressure housings. The dual bellows assembly consists of two opposing internally connected liquid-filled bellows, a center-block, range springs, overrange valves, and a torque tube assembly.
The pressure housings are connected by pipe or tubing to the primary device located in the system piping. Variations in differential pressure within the pressure housings cause the bellows to expand or contract in a linear direction towards the side having the lowest pressure. The linear movement of the bellows is converted into angular rotation when
transmitted to the torque tube shaft by the drive arm and this mechanical motion
actuates the mechanism of the process monitoring instrument. The process monitoring instrument that is connected to the torque tube assembly may be an indicator, a switch, a transmitter, a recorder, or other process control device.

Specifications
The Model 224/224C DPU is available in various pressure ratings to measure to specific ranges between 0-30 inches of water column and 0-1000 psi, with safe working pressure (SWP) ratings from 500 to 10,000 psi (224 Non-C limited to 500 to 3,000 psi SWP). See Table 1-1, page 4. The 224C Bellows Unit Assembly (BUA) is produced in three bellows sizes: 1- 5/8 inch, 5/8 inch, and 3/4 inch diameter. The 1-5/8 inch diameter BUA accommodates differential pressures to 55 psi. The range springs of this BUA are contained within the bellows and do not come in contact with the measured liquid. The 3/4 inch BUA accommodates differential pressures up to 400 psi and the 5/8 inch BUA up to 1,000 psi. The range springs of these BUAs are grouped around the outside of the bellows.

288 - 2013

ITT Barton Switches and Indicators

 
GENERAL FEATURES
 
    Wide Selection of DP Ranges (including absolute, zero-center, and split ranges)
    Safe working pressures up to 6000 PSI
    BARTON DPU Sensor
    High resolution scale spans a 270o arc
    Seal-welded 224C DPU available for leak-proof metering
    Optional one or two narrow deadband switches

ADDITIONAL MODEL INFORMATION
 
199 DPU Actuated

    DP Spans: 10" W.C. to 100 PSID
    Built in pulsation dampener
    Field changeable range spring

199 DPU Actuated Switches & Indicators

    Models 289A & 291B Differential Pressure Switches
    Models 200A & 200AS Differential Pressure Indicators

224 DPU Actuated

    DP Spans: 30" W.C. to 1000 PSID
    Compact and Lightweight

224 DPU Actuated Switches & Indicators

    Models 288C, 290D, 318C, Differential Pressure Switches
    Models 226C, 227C, 232C, 247C, 450C Differential Pressure Indicators

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