Proco Products Inc

Proco Products, Inc. is a Stockton, California-based manufacturer of rubber expansion joints, duckbill check valves, PTFE expansion joints, and pipe penetration seals for industrial piping and ducting systems. The company maintains the largest inventory of rubber expansion joints in North America and holds SAM registration as a federal contractor (CAGE: 0B1N0). Their ProFlex™ elastomeric duckbill check valve line includes four passive-operation styles—Style 710 (flanged), Style 720 (in-line flanged), Style 730 (sleeved), and Style 740 (slip-in in-line)—each offering a 35–50 year service life versus 5–7 years for metal disc valves, with interchangeability guides for competitive replacements. Expansion joint offerings span Series 230 (spool-type wide arch), Series 240/242 (molded spherical), and Series 271 (spool-type super wide-arch) in EPDM, Neoprene, Nitrile, Butyl, and Viton elastomers reinforced with Nylon, Polyester, or Aramid. The Series 440 provides molded PTFE convoluted expansion joints for chemically aggressive service. Rounding out the catalog is the Proco PEN-SEAL pipe penetration seal system with an online sizing calculator. Engineering tools include a Concurrent Movement Calculator and competitor style-conversion guide. Proco holds memberships in the Fluid Sealing Association, AWWA, WEF, CTI, and NAHAD, serving chemical/petrochemical, data center, food processing, HVAC, marine, mining, oil and gas, power generation, pulp and paper, steel, semiconductor, and water/wastewater markets.