The INVALCO Series 423 is a diaphragm-operated, two-way, non-freeze liquid dump valve for high-pressure separators and other vessels where freeze-ups are a problem. The valve threads into the vessel and its trim and seat sit fully immersed in the liquid, preventing freeze-up at the plug and seat. Hammer union body cover for quick repair and replaceable trim (RNCE available). Typically paired with an INVALCO Flextube liquid level control on a Monotube separator.
Key specifications
Body: Low carbon steel
Connections: Vessel 2" MNPT; inlet tube 1" FNPT; outlet 1" FNPT
Body cover: Steel union
Diaphragm operator: Steel, 26 sq. in., nylon-reinforced Buna-N; direct acting (normally closed) standard; 70 psi max. recommended operating, 100 psi max. containment
Maximum working pressure: 3,000 psi
Temperature: -20 to 250 °F
Stem: 303 stainless steel
Packing: Non-lubricated Buna-N
How to specify / order
2" x 1" model NFDSA-130-423, 1/4" taper trim, Cv 1.7, 3,000 psi, 416 hardened SS trim part number P534845, 45 lb (316 SS and carbide trims are shown as not available for this size)
Per the bulletin, specify model number, part number and trim description; part numbers apply only to the exact configuration described
State if RNCE (sour service) construction is required
Only pages 1-2 of the bulletin were used; the parts pages were not reviewed for this listing.
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 SSIN061 Rev 0.1 (11/18) - pages 1-2 read; 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.