Pressure, Mechanical

Catalogs > Industrial Controls Catalog > Condition Sensing Switches and Controls > Pressure, Mechanical > Bulletin 836 Pressure Controls, General Industrial

Bulletin 836 Pressure Controls, General Industrial

Introduction Standards Compliance and Certifications Technical Data Ordering Information Cat. No. Explanation Product Selection
Modifications Accessories Factory Options Refrigeration Controls Approximate Dimensions
Ordering Modifications

Modifications are ordered by adding the appropriate modification suffix code to the catalog number of the basic device. Add suffix codes to the catalog number in descending order (highest number first).

Modifications

Contact Blocks — Trip pressure-indicating scales are supplied on controls with standard contact block.

Description Rating Symbol Suffix
Code
Automatic Operation
Standard Contact Block — Single-pole, double-throw, snap-action. Supplied when a contact block suffix is not added to the catalog number. Control Circuit Rating:
See Specifications
on Standard Contacts
Click to enlarge - 836-15_11-1
Single-pole double-throw — slow-acting contact with no snap action. Contacts close on rise and close on fall with an open circuit between contact closures. Control Circuit Rating:
AC-125VA, 24…250V
Click to enlarge - 836-15_11-2 ⋆ ‡  X171
Single-pole single-throw, normally open — closes on rise. 0.5 Hp, 115V AC
1 HP, 230V AC
Control Circuit Rating:
AC-125 VA, 24…110V
AC-345 VA, 110…600V
DC-57.5 VA, 110…250V
Click to enlarge - 836-15_11-3 ⋆ ‡  X221
Single-pole single-throw, normally closed — opens on rise. Click to enlarge - 836-15_11-4 ⋆ ‡  X231
Single-pole single-throw, normally open — closes on rise. 1 Hp, 115V AC
1.5 Hp, 230V AC
Control Circuit Rating:
AC-600 VA, 110…600V
DC-57.5 VA, 110…250V
Click to enlarge - 836-15_11-3 ⋆ ‡  X321
Single-pole single-throw, normally closed — opens on rise. Click to enlarge - 836-15_11-4 ⋆ ‡  X331
External Manual Reset (Not available in Type 4X Enclosures)§ ♣ 
Single-pole single-throw, normally open — contacts open at a predetermined setting on fall and remain open until system is restored to normal run conditions, at which time contacts can be manually reset. Non-inductive:
5 A, 240V
3 A, 600V
Control Circuit Rating:
AC-125 VA, 24…600V
DC-57.5 VA, 115…230V
Click to enlarge - 836-15_11-3 ⋆ § ♣ ∆  X140
Single-pole single-throw, normally closed — contacts open on rise and remain open until system is restored to normal run conditions, at which time contacts can be manually reset. Click to enlarge - 836-15_11-4 ⋆ § ♣ ∆  X150
Single-pole double-throw, one contact normally closed — contact opens on rise and remains open until system is restored to normal run conditions, at which time contact can be manually reset. A second contact closes when the first contact opens. Click to enlarge - 836-15_11-1 ⋆ § ♣ ∆  X15A
  
⋆ Contact blocks not available for field conversion or replacement.
‡ Minimum specified differential value approximately doubles.
§ Manual reset devices cannot be supplied with an adjustable differential. Inherent differential is approximately three times the differential of the corresponding adjustable differential control.
♣ Available only for replacement of complete open type control in an existing Type 1 or 4 & 13 enclosure. Replacement in a Type 7 & 9 enclosure is not available because it would void UL and CSA.
∆ Type 7 & 9 enclosures for manual reset devices are not also rated Type 4 & 13.

Note: NEMA does not rate contacts to switch low voltage and current. Bulletin 836 Styles A and C Pressure Controls are supplied with silver contacts. The devices are designed to deliver high force snap action to the contacts. This provides exceptional contact fidelity at 24V DC I/O card current level entry when the control is protected in a suitable enclosure for the surrounding environment.

Modifications are ordered by adding the appropriate modification suffix code to the catalog number of the basic device. Add suffix codes to the catalog number in descending order (highest number first).

Modification Description Suffix Code
Oxygen/Nitrous Oxide Service Bellows and fittings are specially prepared for oxygen and nitrous oxide service. The devices are tested with pure oxygen, bellows are plugged for protection from contamination, and a tag warning against contamination is applied. X2
Tamper-Resistant Adjustment Range and differential adjustment screws are designed so that after a setting has been applied to the control, the adjustment screws can be broken off with a pliers. Note: The “break-off” adjustment screw(s) will not be broken off unless a factory setting is given and the order specifies “Break-off Adjustment Screw(s)”. See Ordering Factory-Set Pressure Controls. X4
Neon Pilot Light, 120V AC A high intensity neon pilot light is available for 120V AC, 60 Hz applications and can be wired for ON or OFF operation. The current rating is 1.0 m A.⋆  X9
Red LED Pilot Light, 24V DC A high intensity LED 24V DC pilot light is available to meet the requirements of the automotive, machine tool builders and other industries. The current rating is 22 mA and can be wired for ON or OFF operation.⋆  X15
Green LED Pilot Light, 24V DC A high intensity LED 24V DC pilot light is available to meet the requirements of the automotive, machine tool builders and other industries. The current rating is 22 mA and can be wired for ON or OFF operation.⋆  X18
  
⋆ Not available on combined Type 7 & 9 and 4 & 13, Type 4X, and manual reset devices.