The R627 Relieving Regulator has an internal relief valve that provides protection against over pressurization. As output pressure builds up above the start-to-discharge point the relief seat disengages from the diaphragm and the excess pressure is relieved through the bonnet vent port. As a result, the output pressure reduces and returns to the initial setpoint. The relief seat then reseats against the diaphragm. The action of the R627 internal relief valve in many cases eliminates the need for an external relief valve. The R627 is available in spring ranges from 5-20 PSIG up to 70-150 PSIG. The R627 contains a relief indicator that is attached to the R627 vent assembly. The indicator pops off the vent when the relief valve opens and serves as a visual indicator that the relief valve has operated. Applications Farm Tap Gas Gathering City Gates District Gates Materials of Construction Specifications BelGAs Body, Bonnet, Diaphragm Case Diaphragm Casing Style Maximum Bonnet and Diaphragm Casing Pressure Maximum pressure to spring and diaphragm casing to prevent leak to atmosphere (internal parts damage may occur).

R627 Regulator Rebuild Kits Kit Includes Part Number Part Number Nitrile diaphragms (2), Nitrile valve disk, O-rings, back-up rings, and retaining pin Nitrile diaphragms (2), SS Nitrile valve disk, O-rings, back-up rings, and retaining pin Nitrile diaphragms (2), Nylon valve disk, O-rings, back-up rings, and retaining pin. Nitrile diaphragms (2), SS Nylon valve disk, O-rings, back-up rings, and retaining pin 1 Port Size 3⁄4" 1" 2" Spring Range PSIG BAR 5 - 20 0.34 - 1.4 15 - 40 1 - 2.8 35 - 80 2.4 - 5.5 10 - 95 0.7 - 6.6 70 - 150 4.8 - 10.3 Special Adders None Monitor 150 #RF* 300 #RF* 600 #RF*...

Maximum Inlet Pressure to Keep Maximum Allowable Downstream Pressure from Being Exceeded2 R627 Port Diameter, inches 1. The internal relief performance values are obtained by removing the disk assembly. 2. For inlet pressure in excess of 1000 PSIG (69.0 BAR) refer to the maximum body and disk pressure ratings in the specifications section. 3. For pressure settings under 10 PSIG (0.69 BAR) inlet pressure should be limited to approximately 100 PSIG (6.90 BAR) so the set point adjustment can be obtained. 4. - Shaded areas indicate maximum inlet pressures allowed during system failure only.

R627 Capacities for 1 and 2 Inch Body Sizes1 BelGAs 35 to 80 PSIG (2.4 to 5.5 BAR) Table Continued 1. Capacity is based on 20% droop unless otherwise noted below. 2. For pressure setting under 10 PSIG (06.9 BAR) inlet pressure should be limited to approximately 100 PSIF (6.90 BAR) so that setpoint adjustment can be obtained. 3. i - Blank areas indicate where maximum operating inlet pressure for a given orifice is exceeded.

R627 Parts 1. Capacity is based on 20% droop unless otherwise noted below. i - Blank areas indicate where maximum operating inlet pressure for a given orifice is exceeded.

BelGAs Item