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Electromechanical Pressure Controls

P47 Series: Steam Pressure Limit Control

Pressure P47 Series: Steam Pressure Limit Control

Description

The P47 controls are available with SPST, DPST, or 4-wire, two-circuit contacts for line voltage or low voltage. The pressure connector is 1/4 in. male NPT (0-15 psig only) or 1/4 in. female NPT (for all other ranges).

Features

  • Long-life contact structure with high contact force.
  • Easy-to-adjust single sight set scales show both cut-in and cut-out settings.

Applications

  • P47 steam pressure controls are designed for high limit or operating control applications. A typical use is as a limit control on steam heating systems.  models that close on a pressure increase are used on steam unit heaters to avoid blower operation when steam pressure is below the point required for adequate heating.  The P47 can be used with steam, water, air, or noncombustible gases that do not harm iron or copper.

Selection Chart

Contacts Open on Rise - Automatic Reset
Product     No. of     Range     Differential         Catalog       Product/
Code     Poles     psig in. Hg     psig (bar)         Page       Bulletin
            (bar)     Min.  Max.                  
P47AA-1C     1     0 to 15     2  8         LIT-1927205       LIT-125450
            (0 to 1)     (.1)  (.6)                  
P47AA-4C     1     20 to 50     5  35         LIT-1927205       LIT-125450
            (-.7 to 3.5)     (.3)  (2.4)                  
P47AA-13C     1     (0 to 150)     12  50         LIT-1927205       LIT-125450
            (0 to 10.3)     (.8)  (3.5)                  
                                  
                                  
Contacts Close on Rise - Automatic Reset
Product     No. of     Range     Differential     Catalog     Product/
Code     Poles     psig in. Hg     psig (bar)     Page     Bulletin
            (bar)     Min.  Max.            
P47BA-1C     1     0 to 15     2  8     LIT-1927205     LIT-125450
            (0 to 1)     (.1)  (.6)            
P47AB-6C     1     (0 to 150)     12  50     LIT-1927205     LIT-125450
            (0 to 10.3)     (.8)  (3.5)            
                                    
                                    
SPDT - 4 Wire Two Circuit - Automatic Reset
Product     No. of     Range     Differential     Catalog       Product/
Code     Poles     psig in. Hg     psig (bar)     Page       Bulletin
            (bar)     Min.  Max.              
P47GA-9C     Main Open     (0 to 150)     12  50     LIT-1927205       LIT-125450
      High - Aux.     (0 to 10.3)     (.8)  (3.5)              
      Open Low                             
P47 Series: Steam Pressure Limit Control
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