Pyronics® Hijectors™ Pyronics Hijectors (Product No. 2201-H, 2202-HC) are designed to use high pressure gas (up to 35 psig) to entrain all the air needed to make a complete combustible mixture. Pyronics Hijectors are designed to use high pressure gas (up to 35 psig) to entrain all the air needed to make a complete combustible mixture and to deliver it to the burners at the highest possible pressure. Hijectors are designed along thoroughly proved lines but the external arrangement of the parts has been changed to permit incorporating a number of refinements. These refinements are of particular advantage to the installation and maintenance engineer. By reversing the usual operation of the air shutter and locating it on the body, the following advantages develop: (a) Orifice spud may be removed easily without disconnecting piping. (b) Overall length of unit is materially cut down. (c) Orifice and air entrainment space easily accessible for cleaning or inspection. (d) Air entrainment noises reduced. (e) Shutter cannot get lost even though backed entirely out of the way. A mounting boss with tapped holes simplifies mounting the Hijector solidly on a furnace or appliance. read more

Pyronics® Flange Mixing Tee Pyronics Flanged Mixing Tees are air-gas proportional type mixers designed for low pressure drop operation. Combustion air delivered through a control valve is metered through a precision machined orifice. Controlled air pressure is impulsed to the top of the gas balanced zero regulator. The zero regulator outlet pressure will always be the same as the controlled air pressure. An adjustable gas orifice sets the gas fuel flow rate. This pressure interlocked system maintains equal air and gas pressure drops at all flow rates. Air-gas ratio will be constant over the entire turndown range of the system.   Features and Benefits Compact economical air-gas mixers. High capacity with low pressure drop. Mixers designed for single burners or multiple burners connected to a common manifold. 1-1/4 to 8 I. P. S. mixture connections. Integral gas adjusters. Single valve control of heat input. Flanged construction — no pipe union required. Rugged cast iron construction. read more

Pyronics Midget Mixers (MM) are suction type proportional air-gas mixers. Air passing through the jet produces a suction in the throat section to entrain a fuel gas. The quantity of gas entrained is easily set by the adjuster plug in the gas throttle cock. Once set, the fuel to air ratio remains constant over a wide range of air flows (assuming a constant gas pressure). A Zero Regulator can be used to maintain a constant gas pressure, precisely at atmospheric pressure, for all gas flows. Total heat input of the mixture delivered to the burner system is controlled by a single valve in the combustion air line. This valve may be motor operated for automatic process control. The MMSR, MMCR, and MMTR assemblies include a correctly sized midget Zero Regulator. The accuracy of these units permits turndown ranges up to 3:1 on a capacity basis. Where wide turndown ranges are required, or where a number of mixers are connected to a single regulator, the ‘BZR’ Series Regulators (see Bulletin 5101) are recommended. Features and Benefits Compact sizes Soldered bodies Single valve control Rugged construction Plated surfaces Ratio easily set Marked inlets read more