The INVALCO Series 470 is a diaphragm-operated, two-way, single-port valve for precise burner control, including thermostat service and fuel shutoff in oil, gas, glycol and distillate service. Carbon steel body, soft plug and seat for bubble-tight shutoff, adjustable spring, and RNCE adaptable for sour service.
Key specifications
Body: Carbon steel
Body cover: 18-8 stainless
End connections: 3/4" and 1" FNPT
Maximum working pressure: 275 psi
Maximum differential pressure: Flow over the seat 50 psi; flow under the seat 100 psi
Temperature: -20 to 250 °F
Diaphragm operator: Cast aluminum case, 10 sq. in. nylon-reinforced Buna-N diaphragm; 70 psi max. recommended operating, 100 psi max. containment
Stem / plug and seat: 303 stainless stem; soft seat
Packing: Buna-N O-ring standard
Approx. size: 7.9" tall x 4.0" case; 2.9" clearance to remove adjusting screw; 10 lb
How to specify / order
3/4" FNPT: model DSG-7501-470, part number 80004506, Cv 3.3, Cg 96, 275 psi, 10 lb
1" FNPT: model DSG-101-470, part number 80004302, Cv 3.3, Cg 96, 275 psi, 10 lb
Recommended spares: spring 45008532, diaphragm 45004053, stem and plug 45004222, O-rings 67101327 and 67101636, plus the item 16 O-ring BUN-212-90 (see note)
State if RNCE (sour service) construction is required
Bulletin issues to confirm with the factory: the item 16 O-ring (BUN-212-90) part number is printed 57102151 while every other O-ring uses the 671xxxxx series; the item 7 screw is printed "5/6-18" (5/16-18); item 3 is missing from the parts list; and both sizes are listed with the same Cv (3.3) and Cg (96).
Pricing and lead time are quoted per configuration. Send the model code (or your application details), product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Smith Meter (INVALCO) bulletin SSIN054 Rev 0.1 (1/19); 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.