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Mercoid Series 102/1102 Flanged Chamber Type Level Control
Pressure to 400 psig (28 bar), Temperature to 425°F (218°C), Hermetically Sealed Switches, Series 102
Minimum Specific Gravity: 0.60, Series 1102 Minimum Specific Gravity: 0.40
 

By unique design, you can remove just four bolts from the inspection plate to examine the float and chamber for cleaning or wear without disconnecting the piping or electrical circuitry. They sturdy 102 Series operates at pressure to 400 psi (28 bar) and temperatures to 425°F (218°C). The 102 Series will operate to a minimum specific gravity of 0.60. The 1102 Series will operate to a specific gravity of 0.40 under the same operating pressure and temperature. The 102 and 1102 Series contain a stainless steel float and offer a choice of cast iron, cast steel, or inexpensive cast 316SS float chamber. These series are well suited for applications where ease of accessibility is desired for pressure or vacuum vessels. Electrical circuits using hermetically sealed snap action or mercury contacts are available in a variety of actions including SPST, SPDT, DPDT and DPST combinations. Optional circuits are available for low current, low voltage direct circuits; high direct current or high temperature applications. Electrical enclosures provide general purpose; weatherproof, explosion-proof or explosion-proof/vapor proof capability. The 102 design also features three 1" NPT process connections for side/side or side/bottom piping. When using the side/side process connection, the bottom 1" NPT connection can be used as a drain.  Dimensional Information


 
SPECIFICATIONS
Service: Compatible liquids. Cast iron is not for use with lethal or flammable substances either liquid or gaseous.
Wetted Materials:
Body: Cast iron. Optional cast steel or 316 SS.
Float and Trim: 303 SS, 304 SS, 316 SS, and 430 SS. Option of all 316 SS.
Body Gasket: Carbon.
Temperature Limit: 425°F (218°C).
Pressure Limit: 300 psig (20.7 bar). Optional rating to 400 psig (27.6 bar).
Enclosure Rating: NEMA 4X. Optional general purpose or explosion-proof.
Repeatability: ±1/4" (6.4 mm).
Switch Type: SPDT snap switch, hermetically sealed snap switch or mercury switch. Optional DPDT or two stage.
Electrical Rating: Snap Switch: 12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125 VDC resistive, 0.25A @ 250 VDC resistive. Hermetically Sealed Snap Switch: 5A @ 125 VAC, 5A @ 240 VAC, 5A @ 30 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC, 2A @ 240 VAC/DC. Higher contact ratings available for the mercury switch.
Electrical Connections: Screw terminal.
Conduit Connection: 3/4" female NPT.
Process Connection: 1" female NPT.
Mounting Orientation: Vertical.
Set Point Adjustment: ±1" (25.4 mm).
Weight: 35 lb (15.9 kg).
Agency Approvals: UL.
Specific Gravity: 0.6 minimum for Series 102; 0.4 minimum for Series 1102.
 

SUGGESTED SPECIFICATIONS
Level Control shall be magnetically operated and include (cast iron)(type 316 stainless steel) float chamber with bolted inspection plate. Float shall be removable for cleaning without disconnecting piping. Contacts shall be (snap action type)(hermetically sealed mercury switch type). Unit shall be Mercoid Model 102 WT-(_ _ _ _).
 
POPULAR MODELS
Model Number Switch Type
 102-WT-7810-C-60 SPDT Snap
 
MODEL CHART - SERIES 102/1102
EXAMPLE 102 WT 7810 10 C1 60 12 102-WT-7810-C1-60 Liquid Level Control with flanged chamber enclosure, SPDT snap action switch, fixed deadband, automatic reset, Operating pressure 400 psig (28 bar) at 425°F (218°C), side/bottom, side/side mounting standard with 1" NPT connections, minimum specfic gravity 0.60.  
1102 WT 7810 10 C1 40   Same as 102 Series except minimum specific gravity is 0.40.  
ENCLOSURES  

G

           General purpose, NEMA 1. UL
  WT           Water-tight, NEMA 4, 4X. UL
  E           Explosion-proof, Class I Groups B, C, D, Class II Groups E, F, G, NEMA 7, 9. UL
  EV           Explosion-proof, vapor proof, Class I Groups B, C, D, Class II Groups E, F, G, NEMA 7, 9. UL
CIRCUITS
(for electrical circuits see charts below)		     48XX         Single stage, mercury switch, see chart A or C below.  
    48XX XX       Two stage, mercury switch, see chart A or C below.  
    78XX         Single stage, snap switch, see chart B or D below.  
    78XX XX       Two stage, snap switch, see chart B or D below.  
    78XXHM         Hermetically sealed snap switch, see chart B below.  
    98XX         Single stage, high capacity DC snap switch, use heat fins (HF) if process temperature excced 350°F (177°C), do not exceed 450°F (232°C), see chart B or D below.  
    98XX XX       Two stage, high capacity DC snap switch, use heat fins (HF) if process temperature excced 350°F (177°C), do not exceed 450°F (232°C), see chart B or D below.  
CHAMBER CONSTRUCTION         C     Cast iron chamber, pressure rating 300 psig (22 bar) at 425°F (218°C). UL
        C1     Cast steel chamber, pressure rating 400 psig (28 bar) at 425°F (218°C). UL
        C216     Cast 316SS chamber, float and rod, armature 430SS, pressure rating 400 psig (28 bar) at 425°F (218°C). UL
          60   Minimum specific gravity 0.60. UL
OPTIONS             12 Breather and drain for E type enclosure. Recommended for high humidity or outdoor service.  
 
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