Navien 30011586B Gas Control Valve SIT 848 Sigma for NPE NCB Series

The Navien 30011586B is a genuine OEM gas control valve featuring the SIT 848 Sigma multifunctional gas control system. This critical replacement component is designed specifically for Navien tankless water heaters and combi-boilers, providing precise gas flow regulation and reliable safety shutoff capabilities.

Key Features:

• SIT 848 Sigma multifunctional gas control with dual automatic shut-off valves
• Servo pressure regulator and pneumatic modulator with 1:1 air-gas pressure ratio
• Oil-bathed plungers for quiet, long-lasting valve operation
• Maximum inlet pressure: 60 mbar with output pressure range of 0.5-12 mbar
• 3/4" threaded gas connections (inlet and outlet)
• 220V/60Hz power supply
• Factory-fresh in original Navien packaging

Compatible Models: NPE Series, NPE-2 Series, NCB Series, NCB-E Series (150E/210E/240E), NCB-H Series, NFB Series, NFB-C Series, NFB-H Series, NFC Series, NFC-H Series, NHB Series, and NTI GF200 Series boilers. Replaces older part numbers 30011586A and 30008429A.

This gas valve ensures precise modulation and safe operation of your Navien heating system, with adjustable offset level and air-gas ratio settings for optimal combustion performance.