Inverted Bucket Steam Traps. for efficient condensate drainage of industrial and HVAC equipment

Transcription

1 Inverted ucket Steam Traps for efficient condensate drainage of industrial and HVC equipment

2 Inverted ucket steam traps The proper drainage of condensate is essential to efficient steam system operation. Condensate, if allowed to collect in the steam system, creates several problems: uild-up of condensate in steam mains and headers can eventually lead to water hammer which can seriously damage the steam system and create safety problems. Condensate which is not removed may eventually back up into the steam space of process equipment, consequently reducing efficiency. Inverted ucket steam traps rely on the difference in density between steam and condensate to drain condensate as it forms. This keeps the steam space free of condensate to provide maximum system efficiency. These durable traps are designed to withstand corrosion, dirt, and water hammer to provide long lasting service. On applications where air and non-condensible gases are present, an external air vent can be fitted to assist the normal operation. Spirax Sarco offers a full range of Inverted ucket steam traps to handle steam pressures up to 900 psig. How it works s condensate reaches the trap, it forms a water seal inside the body. The weight of the bucket keeps the valve off its seat so condensate can flow around the bottom of the bucket and out of the trap. Under low load or superheat conditions, the trap may need to be primed with water before system startup (1). When steam enters the underside of the bucket, the bucket becomes buoyant and rises. This positions the lever mechanism such that the main valve snaps shut (2). The bucket will lose its buoyancy as the enclosed steam condenses due to radiation losses, and steam escapes through the vent hole. Once this happens, the weight of the bucket will pull the valve off its seat and the cycle is then repeated (3). ny air reaching the trap will also give the bucket buoyancy and close the valve, preventing condensate flow. The small vent hole in the bucket will bleed air into the top of the trap. The vent hole is of small diameter to reduce steam loss and thus will vent air very slowly. Under startup conditions, this is further compounded by the low differential pressures present. This can lead to waterlogging of the plant and subsequent poor heat transfer. separate external air vent is normally required to ensure speedy and efficient startup of a steam plant. bimetal air vent assist can be added to some models to help with cold startup air

3 Venting of non-condensibles through the vent hole in the top of the bucket provides continuous operation. User benefits Resists water hammer with durable design. Flexible choice of connections: screwed, socket weld or flanged. Simple installation and maintenance with in-line horizontal piping connections. Compatible with a wide array of systems with pressure ranges up to 900 psig. ll working parts are stainless steel providing good resistance to corrosion and wear. odies available in cast iron, steel and stainless steel to meet specific requirements. vailable with either horizontal or vertical flow patterns for piping convenience. ecause condensate flows under the bucket, dirt is kept away from the orifice until the valve is fully open. Inverted ucket steam trap overview Model Sizes (inches) Pipe Configuration ody Material 1/2 3/ /4 1-1/2 2 NPT SW FLG In-line Cast Cast Stn. Horiz. Vert. Iron Steel Steel Strainer ir Vent Check Valve TIS # Series x x x x x x x x Series x x x x x x x x HM34 x x x x x x x Series x x x x x x x x 900 Series x x x x x x x x SI30 x x x x x x SI45 x x x x x x UI30 x x x x x Swivel Connector x Optional Optional Standard Standard Standard Standard

4 Typical applications for Inverted ucket steam traps High Pressure Steam Mains Instant removal of condensate prevents water hammer and improves steam quality. Steam Separator Wet steam can damage equipment and reduce process efficiency. Spirax Sarco separator efficiently knocks out condensate droplets in the steam flow. This condensate must be continuously drained from the separator to prevent it from becoming re-entrained in the steam flow. Spirax Sarco Inverted ucket steam traps discharge condensate as it forms to prevent this from happening. Laundry quipment Laundry equipment uses steam for cleaning and pressing garments. Inefficient condensate drainage will not allow the proper cleaning drying and pressing temperatures to be achieved. Spirax Sarco Inverted ucket steam traps keep the equipment operating smoothly by draining condensate as it forms. 4 Need to know 1. The steam pressure at the trap after any pressure drop through the control valve or equipment. 2. The distance the condensate must be lifted after the trap. Rule of thumb: 2 feet of lift equals 1 psi back pressure (approximately). 3. ny other possible sources of back pressure in the condensate return system. For example: Condensate taken to a pressurized deaerator tank or flash recovery vessel. Local back pressure due to discharge of numerous traps close together into an undersized return. 4. Quantity of condensate handled. Obtained from: Measurement Calculation Manufacturer s data 5. Safety Factor that is dependent upon particular application, typical examples as follows: Steam Mains 2:1 Tracers 2:1 Non-Modulating 2:1 Modulating over 30 psi 3:1 Modulating under 30 psi Steam trap selection and sizing Size trap at full load and 1/2 psi differential Rule of thumb: Use a factor of 2 on everything except Temperature Controlled ir Heater Coils and Converters, and Siphon pplications How to size The difference between the steam pressure at the trap inlet and the total back pressure, including that due to lift after the trap, is the differential pressure. The quantity of condensate should be multiplied by the appropriate safety factor to produce the sizing load. The trap may now be selected using the differential pressure and the sizing load. Note: The inlet pressure to the steam trap should never exceed the of the selected trap, regardless of differential pressure. xample steam trap is required to drain lb/h of condensate from a Unit Heater receiving steam at psig. There is a lift after the trap of 10 ft. Inlet Pressure psig Lift 10 ft. = 5 psi (approximately) Therefore, ifferential Pressure psi - 5 psi = 95 psi Quantity lb/h Safety Factor 2:1 Sizing Load 4,000 lb/h 1-1/4" will handle 7,590 lb/h at 95 psi differential pressure.

5 Inverted ucket steam trap range Series The Series Inverted ucket steam traps are traditional cast iron, horizontal flow products. The stainless steel bucket and valve are resistant to corrosion and water hammer. pressures are available up to 250 psig with capacities to 20,000 lb/hr. Series nother traditional cast iron product, the Series utilizes the popular bottom in/top out flow pattern. The stainless steel bucket and valve are resistant to corrosion and water hammer. pressures are available up to 250 psig with capacities to 20,000 lb/hr. Series Model 1H Size 1/2", 3/4" 3/4" 1" 1-1/4" 2" ody Material Cast Iron NPT Piping Configuration In-Line Horizontal Strainer, ir Vent TIS# psig Series Model Size 1/2" 3/4" 1" 1-1/2" 2" ody Material Cast Iron NPT Piping Configuration In-Line Vertical N/ TIS# psig Top plug not provided on 1H, 12H, 2, 22, 5, 52. C,C1 C Series imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb 1" lb 1-1/2" lb 2" lb 20,000 10,000 5,000 3,000 Series imensions (nominal) in inches Size Type C C1* Weight 1/2", 3/4" 1H lb 3/4" lb 1" lb 1-1/4" lb 2" lb *C1 imension for traps supplied with bi-metal air vents (12H, 22, 32, 42, 52) H-15 Series Capacities ,000 15,000 10,000 7,000 5,000 3,000 1, Series Capacities 216, , , , ,

6 Inverted ucket s HM34 UI30/UI30H The steel construction of the HM34 makes it a logical choice for systems up to 465 psig. vailable in 1/2" through 1" with threaded or socket weld connections. The stainless steel bucket and valve are resistant to corrosion and water hammer. HM34 Size 1/2", 3/4", 1" ody Material Steel NPT, SW Piping Configuration In-Line Horizontal Strainer is Standard TIS# psig The UI30 is a sealed inverted bucket steam trap complete with Spirax Sarco s versatile swivel connector for installations requiring horizontal or vertical flow. The swivel connector is ideal for maintaining the proper trap operation. The two-bolt connector design simplifies maintenance and reduces downtime. C (Connector of choice sold separately) F G HM34 Withdrawal istance H 1/2 HM 34/6 HM34 imensions (nominal) in inches Size C F G H Weight 1/2" lb 3/4" lb 1" lb HM34 Capacities 1 HM 34/12 1 HM 34/10 3/4 HM 34/10 1/2 HM 34/8 3/4 HM 34/8 1 HM 34/8 1 HM 34/5 1/2 HM 34/5 1/2 HM 34/4 1 HM 34/6 3/4 HM 34/7 1/2 HM 34/7 3/4 HM 34/ /4 HM 34/5 UI30 / UI30H imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb 1" lb UI30 / UI30H Size 1/2", 3/4", 1" ody Material Stainless Steel NPT, SW Piping Configuration In-Line, Swivel Connector Check Valve is Standard TIS# Model 30/8 30/7 30/6 30/5 30/ psig psig psig psig psig Model 30H/10 30H/8 30H/6 30H/ psig psig psig psig UI30 / UI30H Capacities UI 30H/10 UI 30/8 UI 30/7 UI 30/ /8 /6 UI 30/5 /5 UI 30/4 6

7 team trap range SI30 / SI30H / SI45 The SI30 and SI45 Inverted ucket steam traps are sealed for tamper-proof operation. The all stainless steel construction is highly resistant to corrosion and water hammer. pressures up to 652 psig are available with sizes ranging from 1/2" through 1" and either threaded or socket weld end connections. SI30 / SI30H / SI45 Model SI30 / SI30H SI45 Size 1/2", 3/4" 3/4", 1" ody Material Stainless Steel NPT, SW Piping Configuration In-Line Horizontal Check Valve is Standard (SI45 only) TIS# psig psig SI30 SI45 C C SI30 imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb SI30H imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb SI45 imensions (nominal) in inches Size C Weight 3/4" lb 1" lb Condensate lb/hr 0 Condensate lb/hr Condensate lb/hr SI45 Capacities ifferential Pressure barg / ifferential Pressure psig SI30/12 SI30/12 SI30/10 SI30/10 SI30/ ifferential Pressure psig SI30 45/8 SI30/7 SI30/6 45/6 ifferential Pressure barg SI30/8 SI30/7 SI30/ SI30H SI30H/12 SI30/12 SI30H/10 ifferential Pressure barg SI30/10 SI30/8 SI30/7 SI30H/7 SI30H/8 SI30/5 SI30H/6 SI30/5 SI30/4 SI30/6 SI30H/5 45/5 SI30/ SI30/ ifferential Pressure psig Condensate kg/hr Condensate kg/hr. Condensate kg/hr. 7

8 Inverted ucket steam trap range /900 Series The and 900 Series of Inverted ucket steam traps are designed for high pressure steam systems with operating pressures available up to 900 psig. The robust forged steel construction with stainless steel internals are resistant to corrosion and water hammer. C Series 900 Series Withdrawal istance Withdrawal C istance Series imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb 1" lb 1-1/2" lb 2" lb 900 Series imensions (nominal) in inches Size C Weight 1/2" lb 3/4" lb 1" lb 1-1/2" lb 2" lb Series Model Size 1/2" 3/4" 1" 1-1/2" 2" ody Material Steel Flanged Piping Configuration In-Line Vertical Check Valve is Standard TIS# psig 900 Series Model Size 1/2" 3/4" 1" 1-1/2" 2" ody Material Steel Flanged Piping Configuration In-Line Vertical Check Valve is Standard TIS# psig Series Capacities 900 Series Capacities 10,000 8,000 6,000 4,000 3, /32 625/22 625/14 NORTHST Nigel Sewell Columbus, Ohio Hub Office 7760 Olentangy River Road Suite 120 Columbus, OH Phone: (614) Fax: (614) /12 622/12 621/10 622/10 621/8 622/8 621/7 622/7 626/24 626/20 625/18 626/18 623/16 625/12 623/12 623/10 623/ ,000 8,000 6,000 4,000 3, /18 926/16 923/925/12 923/925/10 921/922/ Spirax Sarco, Inc Northpoint lvd. lythewood, SC Phone: (803) Fax: (803) Printed in US 11/04. Copyright 4 Spirax Sarco, Inc.