1 INSTRUCTION MANUAL G2…, G3… NPT Threaded Globe Control Valves G2 Series NPT Threaded Globe Valves G3 Series NPT Threaded Globe Valves Flow Pattern Two-way Three-way MixingThree-way Diverting Operation Technical Data G2...BG2...S Servicechilled or hot water, 60% glycol, steam Flow characteristicmodified equal percentage Actionstem up - open A to AB Sizes½” to 2” End fittingNPT Materials: Bodybronzebronze Stemstainless steelstainless steel Plugbrassstainless steel Seatbronzestainless steel Stem packingEDPM o-ringEDPM o-ring Body pressure ratingANSI Class 250 LeakageANSI Class VI Max inlet pressure35 psi [241 kPa]100 psi [690 kPa] Media temperature Water 20°F to 280°F [-7°C to +138°C] 20°F to 338°F [-7°C to +170°C] Ambient temperature32°F to 122°F [0°C to 50°C] Maximum ∆ P Water Steam 35 psi [241 kPa] 20 psi [138 kPa] 35 psi [241 kPa] 50 psi [345 kPa] Rangeability100:1 Technical Data G3 Servicechilled or hot water, 60% glycol Flow characteristicmodified equal percentage (linear flow B to AB) Actionstem down - open A to AB stem up - open B to AB Sizes½” to 2” End fittingNPT Materials: Bodybronze Stemstainless steel Plugbrass Seatbronze Stem packingEDPM o-ring Body pressure ratingANSI Class 250 LeakageANSI Class VI Media temperature Water 20°F to 280°F [-7°C to +138°C] Ambient temperature32°F to 122°F [0°C to 50°C] Maximum ∆ P Water 35 psi [241 kPa] Rangeability100:12 G2…, G3… NPT Threaded Globe Control Valves Instruction Manual Mounting Preferred MountingOptional Mounting DO NOT INSTALL WITH ACTUATOR BELOW PIPE Allow 6" for actuator/adaptor bracket removal. NOTE: DO NOT COVER ADAPTOR BRACKET WITH INSULATION MATERIAL. 6” Installation 1. Inspect shipping package, valve, linkage, and actuator for physical damage. If shipping damage has occurred notify appropriate carrier. Do not install. 2. If a replacement, remove existing valve, linkage and actuator from the piping system. 3. If actuator and linkage are removed, they must be reinstalled correctly. The actuator must be rotated so that the valve sits properly for close off. 4. Install valve with the proper ports as inlets and outlets. Check that inlet and outlet of 2-way valves are correct; check that the "A","B", and "AB" ports of 3-way valves are piped correctly for mixing or diverting. See supplied drawings on previous page. 5. Blow out all piping and thoroughly clean before valve installation. 6. Clean male pipe threads with wire brush and rag. If threads have been damaged or exposed to weather, running a tap or die over the threads may straighten them. Clean pipes, threads, and valve threads before installation; check for any foreign material that can become lodged in trim components. Strainers should be cleaned after initial startup. 7. Pipe sealing compound should be applied sparingly after cleaning and may not be applied to the two lead threads of a screwed pipe, which are innermost inside the valve. Sealing compound is to be placed on male threads only. The purpose is to lubricate the pipes when tightening. 8. Valve must be installed per the mounting drawings shown. 9. Start the connection by turning the valve or pipe by hand as far as possible. Be certain the threads mate by the "feel" of the connection. 10. Use wrenches to tighten the valve to the pipe. Do not over tighten or strip the threads. Two wrenches are necessary to avoid damaging the valve. 11. Two-way valve Normally Open or Closed configurations must be verified by examining both the mechanical drawings and the valve and actuator. See details below. 12. Three-way valve Normally Open or Closed configurations for the Control Port and the Bypass Port must be verified by examining both the mechanical drawings and the valve and actuator. In the piping diagrams the A and B ports may need to be reversed or the actuator set up spring open or fail safe open differently than shown. The specific application determines what fail safe mode is required for freeze or moisture control if applicable. • Avoid installations where valve may be exposed to excessive moisture, corrosive fumes, vibration, high ambient temperatures, elements, or high traffic areas with potential for mechanical damage. • Valve assembly location must be within ambient ratings of actuator. • The valve assembly will require heat shielding, thermal isolation, or cooling if combined effect of medium and ambient temperatures – conduction, convection, and radiation – is above 122°F for prolonged time periods at the actuator. • Strainers should be installed before coil and valve. • Visual access must be provided. Assembly must be accessible for routine scheduled service. Contractor should provide unions for removal from line and isolation valves. • Avoid excessive stresses. Mechanical support must be provided where reducers have been used and the piping system may have less structural integrity than full pipe sizes. • Sufficient upstream and downstream piping runs must be provided to ensure proper valve capacity and flow response. Five diameters in each direction are recommended. • Life span of valve stems and packing is dependent on maintaining non-damaging conditions. Poor water treatment or filtration, corrosion, scale, other particulate can result in damage to trim components. A water treatment specialist should be consulted. • Normal thread engagement between male pipe thread and valve body should be observed. Pipe run that is in too far will damage the valve. Warning! Valve should not be used for combustible gas applications. Gas leaks and explosions may result. Do not install in systems which exceed the ratings of the valve. Safety Notes WARNING: This product can expose you to lead which is known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.govNext >