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a Neoprene (N) or Hytrel (H) sleeve should be specified
This model is technically identical to the SEC99AA-60C
yellow regulator spring engineered for demanding pressure management in residential and industrial gas systems
provided the target set point falls within the 3-10 psi spectrum
ensuring consistent communication with the furnace gas valve
Belimo B318 Valve 30067439-890 a Neoprene (N) or HytrelThe Belimo B318 is a high performance 3 4 inch 3 way characterized control valve engineered for precise modulation in hydronic systems. Featuring a 7. 4 Cv rating, this NPT ball valve utilizes a specialized A port with an equal percentage flow characteristic and a modified B port to ensure constant common port flow. The construction consists of a nickel plated forged brass body paired with a stainless steel ball and stem, providing superior durability