The INVALCO Series 415 (ductile iron) and Series 416 (cast steel WCB) are 2" diaphragm-operated two-way valves for dumping large volumes of fluid quickly. The 415 suits low-pressure separators; the 416 suits high-pressure separators. Both take throttling or quick-opening trim and are NACE adaptable for sour service. All parts interchange with the obsolete Series 414 cast iron valve.
Key specifications
End connections: 2" FNPT and 2" grooved
Body: Series 415 ductile iron A-395 (300 psi); Series 416 steel WCB (1440 psi); steel body cover and diaphragm cases
Topworks: 65 sq. in. reinforced Buna-N diaphragm; 70 psi max recommended operating, 100 psi max containment; direct action (normally closed)
Trim: 303 SS stem, seat and plug with fluoroelastomer facing; 1-1/4" throttling (Cv 19, Cg 660), 1-3/4" throttling or quick-opening (Cv 36, Cg 1200)
Characteristic: Modified equal percentage; flow under the seat for precise modulation, over the seat for shut-in / on-off service
Travel / spring: 1-1/8" travel; 750 lb/in spring; 3-15 psi bench range (210 lb normal, 750 lb max pre-load)
Differential capability: normal pre-load 180 psi over seat (9-15 psi diaphragm) / 150 psi under seat (0-15); max pre-load 360 psi over / 500 psi under (0-23 psi)
Temperature: -20 to 250 °F; packing non-lubricated Buna-N
How to specify / order (part numbers for 1-1/4" throttling / 1-3/4" throttling / 1-3/4" quick opening)
DSG-203-415 2" globe, ductile, 300 psi: 80004378 / 80004374 / 80004373 (62 lb)
DSA-203-415 2" angle, ductile, 300 psi: 80004192 / 80004195 / 80004196 (56 lb)
DQG-203-415 2" globe, ductile, 300 psi: 80004057 / 80004067 / 80004069 (62 lb)
DSG-214-416 2" globe, steel WCB, 1440 psi: 80004362 / 80004367 / 80004370 (62 lb)
Specify model number, part number and trim description
Bulletin notes: DQG-203-415 is listed as "Globe Body Threaded", the same as DSG-203-415, though the series is offered threaded or grooved (confirm the end connection); the dimension table is headed "Pump Model"; and the Series 416 stem part number is printed with nine digits (450011947).
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 SSIN045 Rev 0.1 (11/18); 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.