Technical Data · Publication 836-TD001 · Rockwell Automation

Allen-Bradley Bulletin 836 Pressure Controls — Condition Sensing Specifications

Complete specifications, catalog breakdown, adjustable range / differential tables, and contact ratings for the Allen-Bradley Bulletin 836 pressure control family. Covers Style A (internal copper alloy bellows) and Style C (external copper-alloy or Type 316 stainless-steel bellows), refrigeration Styles H / L / P, and the companion 836T / 837 / 840 / 808 condition-sensing devices. Mirrored from Rockwell Automation Publication 836-TD001D-EN-P.

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836-TD001D-EN-P Publication
December 2024 Revision Date
30 in. Hg Vacuum…900 psi Pressure Range
Up to 1300 psi Max Line Pressure

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Specifications

Pressure Ranges by Style

Style A — Internal Copper Alloy Bellows Adjustable operating range 30 in. Hg vacuum…375 psi; differential 2…95 psi
Style C — External Copper Alloy Bellows Adjustable operating range 30 in. Hg vacuum…900 psi; differential 0.2…125 psi
Style C — Type 316 Stainless-Steel Bellows Adjustable operating range 30 in. Hg vacuum…375 psi; differential 0.4…80 psi
Style A maximum line / surge pressure Line up to 750 psi; occasional surge up to 850 psi
Style C copper alloy line / surge pressure Line up to 1300 psi; occasional surge up to 1600 psi
Style C 316 SS line / surge pressure Line up to 650 psi; occasional surge up to 650 psi

Electrical / Contact Ratings

Contact configuration Single-pole, double-throw (SPDT) snap-action, silver contacts
Non-inductive current rating 5 A at 240V; 3 A at 600V
AC control-circuit rating 125 VA, 24…600V
DC control-circuit rating 57.5 VA, 125…250V
Wiring action Contacts can be wired to open or close on increasing or decreasing pressure
Low-level I/O compatibility Delivers high-force snap action suitable for 24V DC I/O card entry

Process Connections & Media

Style A pressure connection 7/16-20 SAE flare for ¼-in. copper tubing
Style C copper alloy connection ¼-in. NPTF internal pipe thread (also 3/8-in. NPSF on 836-C1 / 836-C1A)
Style C 316 SS connection ¼-in. NPTF internal pipe thread
Compatible media — copper alloy bellows Air, water, noncorrosive liquids, noncorrosive gases, hydraulic fluids
Compatible media — Type 316 SS bellows Air, water, corrosive and noncorrosive liquids and gases, hydraulic fluids
Adjustment Independently adjustable operating range and differential (two-screw, finger-safe)

Mechanical / Environmental

Operating temperature −22…+150 °F (−30…+66 °C)
Storage temperature −22…+200 °F (−30…+93 °C)
Enclosure options Open-type (no enclosure), Type 1, Type 4 & 13, Type 4X non-metallic, Type 7 & 9 and 4 & 13 combination (cast metallic)
Contact block shield Finger-safe; meets IEC 529 / IP2X and CSA
Repeat accuracy ±0.5% of maximum range (typical, per ICS 2-225)
Operation type Snap-action, straight in-line, friction-free bellows actuator

Catalog Number Format

How to read an Allen-Bradley 836 catalog number. Each position encodes a specific configuration attribute.

Position
Meaning
Example
836
Bulletin prefix (pressure controls)
836
a — Style of Device
A = internal bellows (copper alloy); C = external bellows (copper alloy or Type 316 SS)
A = Style A internal bellows
Pressure specifications
Numeric code identifying the adjustable operating range and differential range (see Product Selection table in publication)
1 = smallest copper-alloy range on Style A
b — Enclosure Type
A = Type 1; E = Type 7&9 and 4&13 combined (aluminum); J = Type 4&13 metallic (aluminum); S = Type 4X non-metallic; blank = without enclosure
A = Type 1 enclosure
Modification suffix
Optional suffix codes (X2, K, etc.) added in descending order — see Modifications list
X2 = modification 2
c — Factory Options
blank = shipped at max range / min differential (default); C = customer-specified factory-set trip / reset
C = factory pre-set to customer trip / reset values

Certifications & Compliance

UL 508 Listed (File No. E14842) UL 698 (Hazardous Location) UL 1604 (Hazardous Location) — File E53048 CSA C22.2 No. 14 — File LR1234 (standard) / LR11924 (haz-loc), Class 3211-03 / 3218-05 NEMA ICS-2 IEC 529 / IP2X (contact-block shield, finger-safe) CE Marked (except Hazardous Location enclosure variants)

Document Contents

Full PDF covers the following topics in detail:

  • Catalog-number breakdown for Bulletin 836 Style A (internal bellows) and Style C (external bellows, copper alloy or Type 316 SS)
  • Product selection tables by adjustable operating range, adjustable differential range, maximum line pressure, and maximum occasional surge pressure
  • Pressure-control selection guide covering pressure media compatibility (air, water, hydraulic fluids, corrosive / noncorrosive liquids and gases)
  • Enclosure options — Open type, Type 1, Type 4 & 13 metallic, Type 4X non-metallic, Type 7 & 9 and 4 & 13 combination
  • Standard contact ratings (SPDT snap-action, 5 A @ 240V non-inductive, 3 A @ 600V, AC / DC control-circuit VA ratings)
  • Technical terms glossary — trip setting, reset setting, differential, line pressure, surge pressure, positive vs vacuum operation
  • Approximate dimensions for each enclosure and mounting configuration
  • Modifications and accessories catalog, factory-set pressure control option (836-_C), conversion factors (psi to bar / mbar / kPa / mm H2O / mm Hg / kg/cm²)
  • Companion families: 836T pressure controls for traditional machine tool, 837 mechanical temperature controls, 840 automatic float switches, 808 speed-sensing switches

Frequently Asked Questions

What pressure range does the Bulletin 836 cover?
Style A (internal copper-alloy bellows) covers 30 in. Hg vacuum up to 375 psi with adjustable differentials from 2…95 psi. Style C with external copper-alloy bellows extends up to 900 psi adjustable operating range, 1300 psi maximum line pressure, and 1600 psi occasional surge. Style C with Type 316 stainless-steel bellows covers 30 in. Hg vacuum…375 psi for corrosive media, with line and surge pressure to 650 psi.
What is the contact rating of a Bulletin 836 pressure switch?
Single-pole, double-throw (SPDT) snap-action with silver contacts. Non-inductive rating is 5 A at 240V or 3 A at 600V. AC control-circuit rating is 125 VA across 24…600V, and DC control-circuit rating is 57.5 VA across 125…250V. Contacts can be wired to open or close on either increasing or decreasing pressure.
Can the Bulletin 836 be used with corrosive media?
Only the Style C Type 316 stainless-steel bellows variant is rated for corrosive liquids and gases. Copper-alloy Style A and Style C bellows are rated for air, water, noncorrosive liquids and gases, and hydraulic fluids. Always confirm chemical compatibility of the wetted bellows material against the specific process media before specifying.
What enclosure options are available?
Open type (no enclosure, panel-mount), Type 1 (enclosure code A), Type 4 & 13 metallic (J, aluminum), Type 4X non-metallic (S), and Type 7 & 9 combined with 4 & 13 (E, cast aluminum) for hazardous-location installations. The Type 7&9 enclosure variant is UL 698 / UL 1604 listed for Class I, Division 1 and Class II, Division 1 hazardous locations but is not CE-compliant; all other enclosure variants are CE-marked.
Can I factory-order the 836 pre-set to a specific trip and reset pressure?
Yes — add suffix "C" to the catalog number (836-_C). Standard devices ship at the maximum operating range and minimum differential. The factory-set "C" option pre-sets the control to customer-specified trip and reset values; those values must fall inside the adjustable operating range and differential range for the selected catalog number.
How is the trip setting adjusted versus the reset (differential) setting?
Two independent adjustment screws. The operating-range adjustment screw varies main-spring force — turning it counterclockwise lowers the trip setting and clockwise raises it; this moves both trip and reset settings together. The differential adjustment screw varies the differential blade spring — counterclockwise increases differential (lower reset pressure relative to trip), clockwise decreases it. Adjusting the differential has little or no effect on the trip setting itself.

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