Proper Piping Practices (Pumps)

1. Proper Piping Practices (Pumps)

2. Condensate Return • Hotter boiler feed water temperatures • Minimizes the amount of chemicals required to treat boiler feed water • Eliminates environmental concerns • Minimizes water usage which is critical in some areas • Condensate is a tangible item which can be measured in the form of a savings analysis • Effective return can lower overall costs which can impact profitability Let’s take a look at a savings analysis...

3. A. Condensate Load A= 2000 lb/hr B. Annual hours of operation B= 5000 hrs C. Total Water Cost = (C1+C2) C1. Untreated water and sewage .002 $/gal C2. Water treatment chemicals .003 $/gal C= .005 $/gal D. Make-up water preheating requirements D1. Condensate return temperature 200 °F D2. Make-up water temperature 60 °F D = (D1-D2) x 1.0 BTU/lb / °F D= 140 BTU/ lb E. Steam cost E= 5.00 $/1000 lb F. Savings in water costs (A) x 2000 x (B) 5000 x (C) .005 8.34 lb/gal F= 5,995 $/yr G. Savings for preheating make-up water *(BTU/lb from direct steam injection) (A) 2000 x (B) 5000 x (D) 140 x (E) 5.00 *1000 x 1000 G= 7,000 $/yr H. Cost of steam to run Armstrong Pump Trap 3 x (A) 2000 x (B) 5000 x (E) 5.00 *1000 x 1000 H= 150 $/yr I. Total annual savings = (F+G+H) F. Savings in water costs 5,995 $/yr G. Savings for preheating make-up water +7,000 $/yr H. Cost of steam to run Armstrong Pump Trap - 150 $/yr I= 12,845 $/yr J. Payback of pump purchase Payback = $5,063 (cost of pump package) 12,845 J= .39 yrs

4. Piping Considerations: Doing it right the first time • Check Valves • Fill Head • Lead/Lag • PRV Station • Receiver Sizing • Vent piping • Condensate return lines

5. SWING CHECK VALVE:INLET

6. IN-LINE NON-SLAM CHECK VALVE:Inlet or Outlet

7. Condensate Return Lines • Undersized return lines cause major problems for the entire system. • Increased velocity from undersized return lines result in WATER HAMMER PROBLEMS.

8. Pipe Sizing • Piping should be based on2-3 times the normal condensing ratedue to instantaneous discharge rate of the pump • Minimize elevation changesto prevent hydraulic shock • Utilize check valves at main header to minimize backflow • Run separate lines for pumped and pressurized condensate, if possible, to minimize thermal shock potential • Always calculate themaximum flash ratein return lines

9. CONDENSATE RETURN LINE SIZING • ELIMINATE THE POSSIBILITY OF DAMAGING WATER HAMMER. OFTEN OVERLOOKED DURING SYSTEM UPDATES. • PIPE SIZE IS BASED ON FLASH STEAM VOLUME SINCE ITS VOLUME IS SO MUCH GREATER THAN LIQUID WATER. • FEWER PROBLEMS WITH OVERSIZED PIPE THAN UNDERSIZED PIPING.

14. Vented Receiver Sizing

15. Closed Loop Receiver Sizing

18. Product Range • Single pump capacities from 350 lb/hr to 73,000 lb/hr • Flash recovery vessels • Electric condensate pumps

19. Rescue Cap™ • Fits Spirax Sarco PPC/PPF pumps. • Watson McDaniel • Spence • Hoffman PCS • Gestra FPS23 • Johnson • Clark Reliance

20. Armstrong Stainless Steel Sump Ejector • Replaces standard electric sump pumps (must have high pressure steam available • For steam pits, tunnels and enclosed spaces where ground or rain water can accumulate and requires pumping • Can be used in any application where the water temperature will not exceed 140°F • Great for locations that run underground steam lines where the drip traps are in tunnels or manholes

21. Armstrong AFT Vertical Flash Vessels • Excellent for providing low velocity flash steam with no water carryover • ASME Sec. VIII U stamped to 150 psi (other pressures upon request)

22. Packaged Solutions • Standard Packages • Custom Fabrications • ASME Packages • Low Boy Solutions • Vented Systems • Closed-loop Systems • Process Water Packages and more… Closed-loop Low-Boy Receiver Package

23. Common Industry Applications • Jacketed Kettles • Process Air Heating • Tank Heaters • Shell & Tube Exchangers • Process Media (water, oil, food etc.) • Any steam consuming process heat exchanger utilizing… Modulating Control