Foxboro 43AP series pneumatic indicator controller (PSS 3-1B3 A)

Foxboro 43AP series pneumatic indicator controller (PSS 3-1B3 A)

Product basic positioning and core use

43AP is a pneumatic indication type process controller suitable for process industries. It can measure, display, and closed-loop control four major types of process variables: pressure, vacuum, differential pressure, and temperature. It relies on pneumatic signal output to drive regulating valves and has high reliability and versatility, almost suitable for all types of industrial process scenarios.

Core product advantages

1. Measurement accuracy is not affected by installation stress interference

The control unit and measuring elements are uniformly fixed on a rigid steel plate to isolate the stress caused by deformation during cabinet installation, ensuring stable measurement and control accuracy.

2. Process display without loss of gas/pressure

When the gas supply pressure is lost or the gas source fails, the process variable pointer still maintains the current measurement value and will not return to zero, which facilitates fault diagnosis.

3. All weather protective shell

Fiberglass reinforced polyester shell, with shatter resistant polycarbonate observation window sealing door, protection level IEC IP53, NEMA Type 3, resistant to outdoor, dust, and light rain environments.

4. The installation form is highly flexible

Supports four installation options: panel embedding, wall surface installation, DN50/2-inch vertical pipes, and pipe supports (Yoke).

5. The control algorithm and parameter adjustment range are extremely wide

Complete coverage switch P、PD、PI、PID、 Differential clearance and automatic shutdown all control modes; Integral (reset) adjustable from 0.01 to 50 minutes, differential adjustable from 0.05 to 50 minutes.

6. Rich optional configurations

Built in undisturbed automatic/manual switching, batch anti overshoot function, remote pneumatic setting, electrical alarm contacts, valve direct installation, and dozens of other optional features.

Control function specifications

1. All control modes

-Two position formula (On off), pure proportion P (4-400% proportion band)

-Proportional+Differential PD, Proportional+Integral PI, Complete PID

-Differential gap control (A7 code, gap 1-100%), automatic shutdown protection (A8 code)

2. Adjust the parameter range

-Integral (reset): 0.01~50 minutes/repetition

-Differential: 0.05-50 minutes

3. Output signal standard (choose one from three, specified for ordering)

- 20~100 kPa； 3~15 psi； 0.2~1.0 bar/kg/cm²

4. Pneumatic basic parameters

-Standard operating condition gas consumption: 0.5 m ³/h (0.3 cfm)

-Output pressure gauge range: 0~200kPa/0~30psi/0~2bar

-Gas source standard: rated 140kPa (20psi), normal operating range 115-155kPa (17-23psi), ultimate pressure resistance 210kPa (30psi)

5. Display and Settings

-The measuring pointer and setting pointer are both fluorescent red; White background with black scale, fan-shaped dial with effective length of 150mm (6 inches)

-The setting knob is built-in to the cabinet door, and an external cabinet door setting knob (ESP optional) can be selected

Performance accuracy index (reference condition 24 ± 2 ℃, 50% RH)

1. Input pointer accuracy: Qualified measuring components can achieve a range of ± 0.5%

2. Input → output control accuracy: varies with the type of measuring element

3. Repeatability: Range 0.2%

4. Dead zone: 0.1% range

5. Temperature drift: For every 55 ℃ change in the normal temperature range, the maximum deviation of the control point from the full range is 1%

6. Drift of gas source pressure *: For every 7 kPa (1 psi) fluctuation of the gas source, the control point deviates by 0.2% from the full range

Operating environment conditions

|Operating condition parameters | Reference conditions | Normal operating limits | Extreme operating limits|

|Environmental temperature | 24 ± 2 ℃ (75 ± 3 ℉) | -30~+80 ℃ (-20~180 ℉) | -40~+80 ℃ (-40~180 ℉)|

|Relative humidity | 50% ± 10% | No upper limit | No upper limit|

|Gas supply pressure | 140 ± 1.4kPa (20 ± 0.2psi) | 115~155kPa (17~23psi) | Maximum 210kPa (30psi)|

Classification of the entire series of measuring components (three major categories, multiple materials/ranges)

1. Differential pressure element DEA/DE-B (37 type diaphragm)

-DEA: Zinc cobalt alloy body; DE-B: 316 stainless steel

-Range: 5~50kPa (20~200inH ₂ O), maximum static pressure 14MPa (2000psi)

-Supports zero rise/fall (composite range), only supports pipeline installation (43AP-F)

2. Temperature filled liquid temperature pack component TA series

-TA-1A: -130~+315 ℃, range 25~330 ℃

-TA-2A/2B: -45~+315 ℃, narrow range suitable for low temperature range

-TA-3B: Ultra high temperature -195~+760 ℃, range 70~550 ℃

3. Pressure element PB/PA/PC (bellows, spiral, diaphragm, high-pressure heavy-duty spiral)

-Absolute pressure PA: bellows, double helix structure, 316 stainless steel/bronze material

-Universal Pressure PB: Spiral, Bellows, 50/75mm Diaphragm, Heavy Duty High Pressure Spiral (up to 200MPa/30000psi), Material Contains 316SS, K-Monel (Hydrogen Sulfide Resistant, Complies with NACE Standards), Copper Nickel Manganese, Brass

-Receiving bellows PC: compatible with standard pneumatic input signals of 20~100kPa (3~15psi)

4. Process interface specifications

-≤ 14MPa: R1/4 or 1/4 NPT thread

-14~70MPa: R1/2 or 1/2 NPT thread

-70MPa: 9/16-18 Aminco High Voltage Special Connector

-Pneumatic air source/output interface unified 1/4 NPT

Physical and mechanical specifications

1. Shell material: Fiberglass reinforced polyester shell; Fiberglass polyphenylene ether for door body, UV resistant polycarbonate observation window; Grey shell, blue textured door

2. Weight: Approximately 4.8kg (10.6lb) without measuring components

3. Nameplate: Aluminum label on the inside of the cabinet door, with a maximum of 72 characters; Optional stainless steel nameplate and external customer identification plate

4. Dimensions (in mm/inch)

-Panel embedding: 260mm wide x 320mm high, compatible with up to 16mm thick panels

-Pipeline installation: Suitable for DN50 (2 inches) vertical pipelines, with accompanying installation brackets

-Yoke bracket installation: designed specifically for rear differential pressure components

5. Four installation methods

-P-type: panel embedded, wall surface installation (suffix - P model)

-F-type: On site installation of pipelines/supports (suffix - F model, compatible with high-pressure and differential pressure rear components)

Optional Function List (AS Auxiliary Specification Code)

1. Non disruptive automatic/manual switching (NCD model suffix)

Internal balance pipeline, pressure regulating valve, two position switch, two-step operation to achieve disturbance free switching; The cabinet door must be opened before operation to prevent accidental switching. During maintenance, manual maintenance can be performed separately. There is also an external switching panel available with the SD series option.

2. Manual switch for nozzle sealing: a low-cost and simple manual control solution.

3. Remote pneumatic setting (- P suffix): The external air source signal can remotely modify the set value, and some high-pressure/absolute pressure components cannot be matched.

4. Batch control BATCH-H: dedicated for intermittent processes, suppresses integral overshoot, and quickly corrects when restoring control.

5.70 type electrical alarm contact C-T/70: up to 5 sets of relays, AC/DC contacts 5A/120VAC, 2A/240VAC, available in ordinary explosion-proof areas.

6. Control valve direct installation CVM: Models without rear components can be directly assembled on the P50/P110 actuator valve body.

7. Built in air source processing IAS: pressure regulating filter pressure reducing valve+pressure gauge, only available for pipeline installation models.

8. Gas tight casing with 1/2NPT exhaust port seal, suitable for clean and non corrosive process gas conditions.

9. Anti tampering knob TPK: Remove the door knob and use specialized tools to open the door, preventing unauthorized modification of parameters.

10. Other options: glass wear-resistant observation window, stainless steel nameplate, customer extended identification plate, external integral feedback interface ECRB, etc.

Model coding rules (complete model structure)

Basic coding structure: 43AP - installation type+control code+output specification+manual/automatic switching code - optional suffix/measuring element code`

1. 43AP: Basic model, pneumatic indicator controller

2. Installation: - P (panel/wall), - F (pipe/bracket)

3. Control codes: A1 (P), A2 (PD), A3 (PI), A4 (PID), A7 (differential clearance), A8 (automatic shutdown)

4. Output specifications: 5 (20~100kPa), 2 (3~15psi), 264 (0.2~1.0kg/cm ²)

5. Manual automatic switching: NCD=built-in disturbance free switching; No code=No switching

6. Short line suffix: - P remote setting, BATCH-H batch function, etc

7. Components after slash:/DE differential pressure,/PA absolute pressure,/PB universal pressure,/TA temperature,/PC receiving bellows

Example: 43AP-PA42N-P/PB-AA (panel PI control, 3-15psi output, built-in disturbance free switching, remote setting, 316 stainless steel spiral pressure element)