Description Thermodynamic steam traps, generically referred to as disc traps, utilize the energy in hot, flashing, condensate to snap the trap closed and prevent the loss of live steam.  With only one moving part, this type of trap is very rugged.  Water hammer resistant and able to withstand superheated steam service, these traps are commonly found on steam main drip and steam tracing applications. WD600 WD600S(B) WDU450 WD900 WD3100 Series WD600 Small, lightweight, compact, and virtually indestructible to water hammer and freezing, the Series WD600 was designed as an exact replacement in capacity and end-to-end dimensions for existing thermodynamic traps.  The all stainless steel, hardened, ground, and lapped seating surfaces result in efficient and dependable service that you can count on. Series WD600 Capacities: to 4840 lbs/hr [2195 kg/hr] Maximum operating pressure: 600 psig [41.4 bar] Sizes: 3/8", 1/2", 3/4", and 1" Connections: NPT Material: Hardened 420 stainless steel Weight: 3/4 to 3 lbs [0.3 to 1.4 kg] The WD600L is a reduced capacity trap recommended for low condensate load applications.  Available in 1/2" and 3/4" sizes. Series WD600S A sister to the WD600, the WD600S provides an integral strainer and is available with a blow down valve.  The all stainless steel, hardened, ground, and lapped seating surfaces result in efficient and dependable service that you can count on. Series WD600SB shown (optional blowdown valve) Capacities: to 3140 lbs/hr [1424 kg/hr] Maximum operating pressure: 600 psig [41.4 bar] Sizes: 1/2" and 3/4" Connections: NPT Material: Hardened 420 stainless steel Weight: 1-1/2 to 2-3/4 lbs [0.7 to 1.2 kg] The WD600LS(B) is a reduced capacity trap recommended for low condensate load applications. Series WDU450 This Thermodynamic Trap Module mates to the industry standard universal connector.  Drastically reducing trap replacement time and cost, the Watson McDaniel Universal Connectors are available both with and without an integral strainer and blow down valve.  Due to their rugged construction, they will remain in line virtually indefinitely.  The trap is easily renewable by removing two bolts and either servicing or replacing the trap module.  This can be accomplished in minutes without disturbing any critical piping.  The universal connector is built to industry standards, and accepts many manufacturers steam traps. Series WDUS450 with integral strainer Capacities: to 1630 lbs/hr [739 kg/hr] Maximum operating pressure: 450 psig [31.0 bar] Sizes: 1/2" and 3/4" Connections: NPT, socket weld Trap module seat & disc material: Hardened 420 stainless steel Body Material: 316 stainless steel Weight: 2-3/4 to 3-3/4 lbs [1.2 to 1.7 kg] The WDU(S)(B)450L is a reduced capacity trap recommended for low condensate load applications. Series WD900 A high pressure, in line weldable trap able to handle superheat. Series WD900 Capacities: to 970 lbs/hr [440 kg/hr] Maximum operating pressure: 900 psig [62.1 bar] Sizes: 1/2" and 3/4" Connections: NPT and socket weld, optional class 600 RF flanged Seat and Disc: Hardened 420 stainless steel Body: Low Carbon ASTM A-217 Grade WC9 Chrome-Moly Alloy Steel Insulation Cover is standard Weight: 4.1 to 11.6 lbs [2.1 to 5.3 kg] Series WD3100 In line weldable trap able to handle superheat. In line repairable. Exclusive steam jacket design. Series WD3000 Capacities: to 490 lbs/hr [220 kg/hr] Maximum operating pressure: 675 psig [46.5 bar] Sizes: 1/2" and 3/4" Connections: NPT and socket weld, optional class 600 RF flanged Seat and Disc: Hardened 420 stainless steel Body: 316 S/S Weight: 4.1 lbs [1.9 kg]