The INVALCO Models CMAQ and CMAF are snap-action, float-operated liquid level controls with a three-way Micro Valve actuated by two adjustable arms. The pusher arms set both the high and low level set points, so the control span can be adjusted easily and accurately. No external power is required. The 3-1/2 in ball float passes through a 4 in tank nozzle, and the unit mounts to the vessel wall with a 4 in grooved coupling adapter (CMAQ) or 4 in 150# ANSI flange (CMAF).
Key specifications
Float: 3-1/2 in diameter x 6 in long, 316 SS; standard 14 in float rod
Working pressure: 300 psig (limited by float collapse pressure and process connection); CMAF-402S flange rated 275 psi at 100 °F
Temperature: -20 to 250 °F
Micro Valve: Model 316F1 three-way, three 1/4 in FNPT ports, anodized aluminum body; standard 1/16 in orifice (100 psi max line pressure), optional 1/32 in (250 psi max)
Gear stem: 303 SS standard; 316 SS optional
Port action: Float low: port 1 closed to 2, port 3 open to 2. Float high: port 1 open to 2, port 3 closed to 2 (port 2 common)
Options: NACE model; steel or ductile iron models NACE-adaptable; 316 SS (consult factory); other float sizes (consult factory)
Float rods: 8, 14 (std), 20, 26 and 32 in, 303 SS (P/N 45231080, 45231140, 45231200, 45231260, 45231320); 316 SS rods 45233081 (8 in), 45233140 (14 in), 45233202 (20 in)
How to specify / order
The bulletin asks for the part number and catalog model number:
CMAQ-403: 4 in grooved, 300 psi, ductile iron body, 316 SS float - P/N 80002101
CMAF-402S: 4 in 150 lb flange, 275 psi, cast steel body, 316 SS float - P/N 80002002
Float rod length if other than the standard 14 in (part numbers above)
Micro Valve orifice (1/16 in standard or 1/32 in for line pressures up to 250 psi), 316 SS gear stem or NACE construction if required
Bulletin notes: the model is printed "CMAF-402S" in the ordering table but "CMAF-402-S" in the parts list; float-rod metric lengths are rounded inconsistently (20 in printed as 507 mm, about 508 mm; 32 in as 811 mm, about 813 mm); the 316 SS rod part numbers do not follow one pattern (45233081 for 8 in, 45233202 for 20 in) - confirm with the factory; "Nozzel" on the drawing. Spare parts listed include Micro Valve 316 F1-B (P/N 87000214) and float ball (P/N 45005655). Related listings: SM-INV-CMEAX (electric switch version), SM-INV-CMAS203, SM-INV-MICROVALVE.
Pricing and lead time are quoted per configuration. Send the model code (or the details above) with your product and operating conditions to Flow Measurement Services for a quote. Specifications summarized from Smith Meter bulletin SSIN007 Rev 0.1 (8/17); confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.