The Armstrong PT-300 Series Horizontal, Low Profile Pump Trap is the low maintenance non-electric solution to move condensate or other liquids from low points, low pressures or vacuum spaces to an area of higher elevation or pressure. Condensate can be returned at temperatures well above the 200°F (93°C) limit of conventional electric condensate pumps without the headaches of leaking seals or cavitation problems.

Features

• Economical non-electric operation. Uses inexpensive steam, air or inert gas.
• Low-maintenance operation. No leaking seals, impeller or motor problems means lower maintenance. No NPSH issues.
• Space-saving size. Low-profile body fits in tight spaces while allowing minimal fill head.
• Lower installation costs. Single trade required for installation and maintenance.
• Peace of mind. Standard unit is intrinsically safe.
• Durable construction. ASME code-stamped carbon steel body vessel.
• Corrosion resistance. Internals are all stainless steel for corrosion resistance and long life.
• Heavy-duty springs. Springs are made from long-lasting Inconel X-750.
• Efficiency. A closed loop means no motive or flash steam is lost. All valuable Btu’s are captured and returned to the system.
• Safety. The pump can be used in flooded pits without fear of electrocution or circuit breaker defaults.
• Externally removable/replaceable seats. Seats can be replaced or cleaned without removing the mechanism assembly.

Physical Data

PT-300 Pumping Trap Physical Data
Model Number	PT-308 / PT-312
	in	mm
“B”	27	686
“C”	16	406
“D”	15	381
“E”	10	254
“F”	11	279
“G”	5-7/16	138
“H”	21-3/16	538
“P”	1-5/8	41
“R”	4-13/16	122
“S”	5-1/32	128
“T”	12	305
“U”	2-1/4	57
“V”	7/8	22
“W”	1-1/4	32
“X”	1-1/16	27
Face to Face	27-1/2*	698
Weight lb (kg)	154 (70)
Number of Body/Cap Bolts	8
Check Valve Conn. in (mm)	2 (50)	3 (75)
Bronze Check Valves lb (kg)	16 (7)	29 (13)
Stainless Steel Check Valves lb (kg)	15 (7)	38 (17)

*Tolerance +/- 1/2"

Maximum Allowable Pressure (Vessel Design): 150 psig @ 650°F (10 bar @ 343°C) Maximum Operating Pressure: 125 psig (9 bar)

INFO

For a fully detailed certified drawing, refer to CDF #1001.

Materials

PT-300 Pumping Trap Materials
Name of Part	Series PT-300*
Body and Cap	Fabricated steel 150 psi ASME Sec. VIII design “U” stamped
Cap Gasket	Graphoil
Bolts	SA-449 steel
Nuts	None
Inlet Valve Assembly	Stainless steel
Vent Valve Assembly	Stainless steel
Valve Assembly Washers	Zinc plated steel
Plug	Steel
Mechanism Assembly	Stainless steel
Springs	Inconel X-750

*Series PT-300 is available in all stainless steel. Consult factory.

INFO

Optional flanged or socketweld connections available. Consult factory.

Connection Sizes

PT-300 Pumping Trap Connection Sizes
Model	Horizontal Steel
	PT-308		PT-312
	in	mm	in	mm
Inlet Connection	2	50	3	80
Outlet Connection	2	50	2	50
Motive Pressure Connection	1/2	15	1/2	15
Vent Connection	1	25	1	25
Optional Gauge Glass Connection	1/2	15	1/2	15

Capacities

PT-300 Pumping Trap Capacities
Motive Pressure		Total Lift or Back Pressure		PT-308 (12" Fill Head) 2" x 2"				PT-312 (12" Fill Head) 3" x 2"
				Steam Motive		Air Motive		Steam Motive		Air Motive
psig	bar	psig	bar	lb/hr	kg/hr	lb/hr	kg/hr	lb/hr	kg/hr	lb/hr	kg/hr
15	1.0	5	0.34	6,900	3,130	9,200	4,173	9,000	4,082	12,300	5,579
25	1.7			10,200	4,622	10,900	4,944	13,200	5,987	14,200	6,441
50	3.5			10,600	4,808	11,100	5,035	15,100	6,849	15,800	7,167
75	5			10,800	4,898	11,300	5,126	15,300	6,940	16,100	7,303
100	7			11,200	5,080	*	*	15,500	7,031	*	*
125	8.5			11,600	5,261	*	*	16,600	7,530	*	*
25	1.7	15	1	7,000	3,175	10,100	4,581	9,000	4,082	11,200	5,080
50	3.5			9,600	4,354	10,900	4,944	12,800	5,806	13,800	6,260
75	5			10,750	4,876	11,100	5,035	14,200	6,441	15,000	6,804
100	7			10,900	4,944	*	*	14,300	6,486	*	*
125	8.5			11,300	5,125	*	*	15,100	6,849	*	*
35	2.5	25	1.5	7,100	3,221	9,200	4,173	8,100	3,674	11,500	5,216
50	3.5			8,300	3,765	10,200	4,627	10,200	4,627	12,750	5,783
75	5			10,100	4,581	11,000	4,989	12,500	5,670	13,500	6,123
100	7			10,200	4,627	*	*	12,700	5,761	*	*
125	8.5			10,300	4,672	*	*	13,000	5,897	*	*
50	3.5	40	2.75	5,700	2,585	7,600	3,447	6,600	2,994	9,800	4,445
60	4			6,600	2,994	8,800	3,992	8,400	3,810	10,500	4,763
75	5			7,600	3,447	10,100	4,581	9,800	4,445	12,700	5,761
100	7			8,400	3,810	*	*	10,100	4,581	*	*
125	8.5			9,400	4,264	*	*	10,300	4,672	*	*
70	4.5	60	4	4,500	2,041	7,000	3,175	6,000	2,722	10,200	4,627
75	5			4,700	2,132	7,100	3,221	6,400	2,903	10,400	4,717
100	7			6,400	2,903	*	*	7,100	3,221	*	*
125	8.5			6,600	2,994	*	*	7,400	3,357	*	*

TIP

Published capacities are based on the use of external check valves supplied by Armstrong. Fill head measured from drain point to top of pump cap. Although motive pressures are shown at high pressure differentials (difference between motive inlet pressure and total lift or back pressure), it is preferable to use a motive pressure of 10 - 15 psig (0.65 - 1 bar) above discharge (outlet) pressure. This ensures longevity of economical (brass) check valves and reduces both venting time and temperature differential (on steam). If a higher differential is used, stainless steel check valves are recommended. *Consult factory.

Options

PT-300 Capacity Conversion Factors for Other Fill Heads
Fill Head		in	mm	in	mm	in	mm	in	mm	in	mm
		0	0	6	152	12	305	24	610	36	914
Model	PT-308	0.7		0.85		1.0		1.2		1.3
	PT-312	0.7		0.85		1.0		1.08		1.2

Use of external check valves required for operation of pumping trap. Fill head is measured from drain point to top of cap.

• Inlet Swing Check Valve NPT Bronze ASTM B 62 Teflon® Disc Class 150 (Minimum)
• Outlet Stainless Steel Check Valve Class 150 (Minimum)
• In-line Check Valves Stainless Steel Non-Slam Check Valves
• Bronze Gauge Glass Assembly
• Steel Gauge Glass Assembly
• Removable Insulation Jacket
• Digital Cycle Counter