Miller-Smith Equipment 30-50-510 LPG CGA-510 welding regulator

LPG regulator with CGA-510 inlet

The Miller-Smith Equipment 30-50-510 is a single-stage cylinder regulator built for liquefied propane service. It connects to a CGA-510 tank valve and delivers gas through a 9/16 in.-18 LH B outlet. The brass body and neoprene diaphragm are rated for a maximum inlet pressure of 400 psi. It carries a UL listing for general-purpose welding applications.

Delivery pressure fixed at 50 psi

The regulator supplies a non-adjustable delivery pressure of 50 psi, making it suitable only for equipment designed to operate at that exact outlet pressure. A 2 in. supply-pressure gauge reads up to 400 psi so the operator can monitor cylinder contents. There is no downstream pressure gauge included. Buyers who need adjustable outlet pressure or a different fixed setting cannot use this model.

Steady output under continuous flow

The single-stage design maintains the 50 psi set point while cylinder pressure declines, though outlet pressure will rise gradually as supply pressure drops. The Sure Seat filtered seat and nickel-plated bonnet resist contamination during extended use. The 2.0 in. body diameter allows compact mounting on portable carts. Units requiring precise pressure stability at very low cylinder pressures may need a two-stage alternative.