PENN SEPARATORS BLOWDOWN EQUIPMENT

Penn Blowdown Separators

Intermittent Boiler Blowoff, Hydronic S.R.V's, and other Process Blowdown

Feed and BlowdownEquipment & Systems

Blowdown Separators

Intermittent Boiler Blowoff, Hydronic S.R.V's, and other Process Blowdown

Proven Performance

The modern and efficient way of handling boiler intermittent blowdown. Separators have also been used for hydronic safety relief valve discharges, deaerator overflows, autoclave draining, and other high flow pressurized condensate to drain applications. The smaller diameter takes up less space then a traditional blowoff tank while providing an efficient separation of flash steam and condensate.

Proven Design Features

Penn has been a leading supplier of Blow-down Separators for over forty years. This experience goes into every separator we build. Standard features like stainless steel internals and self drying design assure years of trouble free service.

Cyclone Spinning Action

The tangential entry and small diameter creates a cyclone action to efficiently separate steam and condensate. The clean steam flows up through the vortex to the vent discharging quitely to atmosphere.

Controls Thermal Pollution

Most Separators come packaged as shown with accessories for automatic cooling of condensate to drain which meets local sewer temperature requirements. The package shown includes a A34B Separator with A100L Angle Legs, A18DF Aftercooler, Self Actuating Temperature Regulator Valve, Strainer and Bimetal Thermometer. Other package options are available.

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PENN BLOWDOWN SYSTEMS & BLOWOFF TANKSDATA AND SPECIFICATIONS

Freight, installation (hook-up), start-up and operator training are available through Smith Hughes upon request.

Blowdown System Selector Chart

USING CHART A

Select Separator Size from Chart "A" by matching your Operating Pressure and Bottom Blowdown Valve Size. The largest size valve and highest pressure should be used for multiple boilers.
From Chart "A" read the height "H" of the separator, "I" the inlet size to match blowdown valve size, "D" the drain and "V" atmospheric steam vent recommended sizes. All connections come standard as NPT. Flanges are optional.
All Separators are 14" in diameter and are ASME Code "UM" designed and stamped for 250 psig at 450 deg. F. Select plate thickness of 5/16" or 3/8" as local regulations required. Add for National Board "U" Stamping when required. Flanged units are limited in pressure to flange rating and would be stamped accordingly.
The separator size is now determined and the piping can follow these sizes. Separators are designed to quietly exhaust steam to atmosphere at 90 dB(A) or less and operate at a pressure of less than 5 psig. Drain sizing includes cooling water required for 140 deg. F. drain temperature. Select cooling valve size from chart "B" .

CHART A– BOILER BLOWDOWN SEPARATORS
Blowdown Valve Size Separator Dimensions Boiler Oper. Pressure	*1"				1-1/4"				1-1/2"				2"				2-1/2"				3"
	H	I	D	V	H	I	D	V	H	I	D	V	H	I	D	V	H	I	D	V	H	I	D	V
0-15	14	1	2	2-1/2	20	1-1/4	3	4	20	1-1/2	3	4	20	2	4	5	34	2-1/2	5	6	34	3	6	5
16-50	20	1	2	2-1/2	20	1-1/4	3	4	34	1-1/2	3	4	34	2	4	5	34	2-1/2	5	6	34	3	6	5
51-100	20	1	3	2-1/2	34	1-1/4	4	4	34	1-1/2	4	4	34	2	5	5	34	2-1/2	6	6	34	3	8	8
101-125	34	1	3	3	34	1-1/4	4	4	34	1-1/2	4	4	34	2	5	5	56	2-1/2	6	6
126-150	34	1	3	3	34	1-1/4	4	4	34	1-1/2	4	5	56	2	5	6	56	2-1/2	6	6
151-175	34	1	3	3	34	1-1/4	4	4	34	1-1/2	4	5	56	2	5	6	56	2-1/2	6	8
176-200	34	1	3	3	34	1-1/4	4	5	56	1-1/2	5	5	56	2	6	6	56	2-1/2	6	8
201-225	34	1	4	4	56	1-1/4	4	5	56	1-1/2	5	5	56	2	6	6	56	2-1/2	8	8
226-300	56	1	4	4	56	1-1/4	4	5	56	1-1/2	5	5	56	2	6	8	56	2-1/2	8	8
*Miniature Boilers: 1/2"-1" Blowdown Valve up to 1000#/hr Blowdown use 14" High, 1" Inlet, 2" Drain, 2-1/2" Vent. For Boilers above 300 PSIG see Selector Chart H.

USING CHART B

Depending upon the temperature of the cooling water used, locte the section of the chart which applies, 50-70 or 71-80 F.
At the top of the chart locte Separator Inlet size and in left column under the section selected in step one, locate Boiler Operating Pressure. You now have a selection of three valve sizes.
From the top of chart select the cooling water line pressure, either 40, 50 or 60 and read the desired valve and line size.
A pressure reducing valve should be used prior to temp regulator for cooling water above 60 PSIG.

CHART B – COOLING WATER LINE AND VALVE SIZE

Separator
Inlet Size
Cooling Water
Pressure (PSI)
Boiler Oper. Pressure

*1"

1-1/4"

1-1/2"

2"

2-1/2"

3"

40#

50#

60#

40#

50#

60#

40#

50#

60#

40#

50#

60#

40#

50#

60#

40#

50#

60#

Use For
50-70 F
Cooling
Water
Temp.

0-50

1/2

1

1-1/4

1

1-1/4

1-1/2

2

51-100

1

3/4

1

1-1/4

1-1/2

1-1/4

2

2-1/2

101-125

1

3/4

1-1/4

1

1-1/4

2

1-1/2

2

2-1/2

126-175

1

1-1/4

2

2-1/2

2

2-1/2

176-225

1

1-1/4

1-1/2

1-1/4

2

2-1/2

2

3

2-1/2

226-250

1-1/4

1-1/2

1-1/4

2

2-1/2

2

3

2-1/2

251-300

1-1/4

1-1/2

1-1/4

2

2-1/2

3

Use For
71-80 F
Cooling
Water
Temp.

0-50

3/4

1/2

1

1-1/4

1

1-1/4

2

1-1/2

2-1/2

2

51-100

1

3/4

1-1/4

1

1-1/4

2

1-1/2

2

2-1/2

2

2-1/2

101-125

1

1-1/4

2

2-1/2

2

2-1/2

126-175

1

1-1/4

1-1/2

1-1/4

2

2-1/2

2

3

2-1/2

176-225

1

1-1/4

1-1/2

1-1/4

2

2-1/2

4

2-1/2

3

226-250

1-1/4

1-1/2

1-1/4

2-1/2

2

2-1/2

4

2-1/2

3

251-300

1-1/4

1-1/2

1-1/4

2

1-1/2

2-1/2

2

2-1/2

4

2-1/2

3

USING CHART C

Use Set Pressure of Valves and Boiler MBH or BHP x 33.3 to determine Sep. "H"eight, "D"rain and "V"ent Size.
Separator Inlet Size is deterined by Relief Valve, Outlet Size. When two or more valves are manifolded together, the Inlet size must be larger than the combeines Cross Sectional area of Valves' Outlets (See Chart C1).
Separator Diameter is 14" except:
16" diameter when Inlet is 4" and Vent is 5" or larger
18" diameter when Inlet is 5" and Vent is 5" or larger
Plate Thickenss 5/16" or 3/8" as required by Local Regulations.
All Separators are constructed to ASME Code.

CHART C – SAFETY/RELIEF VALVE SEPARATORS
Set Pressure Valves (PSI) Separator Dimensions Boiler MBH	0-49#			50-99#			100-150#			151-200#			201-250#			251-350#			351-400#
Set Pressure Valves (PSI) Separator Dimensions Boiler MBH	H	D	V	H	D	V	H	D	V	H	D	V	H	D	V	H	D	V	H	D	V
0-500	14	1-1/2	3	14	1-1/2	3	14	1-1/2	3	14	1-1/2	3	14	1-1/2	3	14	1-1/2	3	14	1-1/2	3
501-670	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3
671-1005	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3	14	2	3
1006-1340	14	2-1/2	3	14	2-1/2	3	14	2-1/2	3	14	2-1/2	3	14	2-1/2	3	14	2-1/2	3	14	2-1/2	3
1341-1675	14	3	3	14	3	3	14	3	3	14	3	3	14	3	3	14	2-1/2	3	14	2-1/2	3
1676-2010	14	3	3	14	3	3	14	3	3	14	3	3	14	3	3	20	3	4	20	3	4
2011-2345	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4
2346-2680	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4	20	3	4
2681-3350	20	4	4	20	4	4	20	4	4	20	4	4	20	3	4	20	3	4	20	3	4
3351-4185	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5
4186-5025	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5	20	4	5
5026-6695	20	5	5	20	5	5	20	5	5	20	4	5	20	4	5	20	4	5	20	4	5
6696-8370	20	5	5	20	5	5	20	5	5	20	5	5	34	5	6	34	5	6	34	5	6
8371-10045	34	5	6	34	5	6	34	5	6	34	5	6	34	5	6	34	5	6	34	5	6
10046-11720	34	6	6	34	6	6	34	6	6	34	6	6	34	5	6	34	5	6	34	5	8
11721-13400	34	6	6	34	6	6	34	6	6	34	6	8	34	6	8	34	6	8	34	6	8
13401-16740	34	6	8	34	6	8	34	6	8	34	6	8	34	6	8	34	6	8	34	6	8
16741-20080	34	8	8	34	8	8	34	8	8	34	8	8	34	6	8	34	6	8	34	6	8

Blowdown Separators & Accessories Dimensions

With Threaded Connections

Blowdown Separator Size:

MODEL	DIA.	HEIGHT
A14	10.75"	21"
A20	14"	22"
A34	14"	34"
A56	14"	56"

Connections Sizes Per Selector Chart:

"I" INLET	"D" DRAIN	"V" VENT
1", 1 1/4", 1 1/2", 2", 2 1/2", or 3"	2", 2 1/2", 3", 4", 5", 6", or 8"	2", 2 1/2", 3", 4", 5", 6", or 8"

Drain Size Determines Leg Length:

"D" DRAIN SIZE	A	B
"D" = 2"	22"	2"
"D" = 2 1/2"	23"	3"
"D" = 3"	24"	4"
"D" = 4"	25"	5"
"D" = 5"	30"	10"
"D" = 6"	34"	14"

Parallel Blowdown Systems

Boiler Blowdown Separators

Single units were designed to handle up to 300 P.S.I.G. On heating, process or power boilers. Now Penn Separator provides special manifolds to distribute the flow from the Blowdown Line to each of two units or up to 1000 P.S.I.G. and three units for up to 1600 P.S.I.G. These Parallel Separator are 14" in diameter requiring minimum of floor space, or wall hung. Manifolds are provided as required to meet existing conditions. These 14" diameter vessels need not have as heavy wall as a conventional large blowdown tank, and corrosion is zero due to the exclusive Stainless Steel Striking Plate and the Self-Draining, Self-Drying design.

Boiler Blowdown into 3 Separators

Widely successful as singular units, are now arranged parallel in batteries of two or three units.

Typical Installation

In designing the Boiler Room for the Louisiana Polytechnic Institute, one Penn Separator Parallel System was used on a 400 PSIG Boiler in place of a Conventional Blowdown Tank. This is the Modern Maintenance-Free method of handling Boiler Blowdown.

Penn Blowoff Tanks

Traditional Style Blowoff Tank Sized to National Board

Blowoff Tanks

Penn Blowoff tanks come standard ASME Code Sec. VIII, Div.1 designed and stamped for 50 psig at 450 deg. F. and are of a welded construction from 3/8" thick carbon steel materials. A blowdown tangential inlet with stainless steel wear plate, water overflow outlet which extends to within 6" of the bottom of the tank, a 3/4" siphon shall be located in the top portion of the outlet pipe and atmospheric steam vent. The tank would be supported by a set of four angle legs with floor pads. 36" diameter and smaller tanks include couplings for inspection ports and larger tanks include a manway. A level gauge, thermometer, and pressure gauge can also be supplied as an option.

NATIONAL BOARD BOILER BLOWOFF EQUIPMENT RULES 1991 EDITION

The blowdown from a boiler(s) that enters a sanitary sewer or discharges in an area which could be hazardous to life or property should be controlled. The control should be through some form of blowoff equipment which will reduce the pressure and temperature to acceptable safe levels.

Penn Blowoff Tanks are completely welded and assembled in Brookville, Pennsylvania, USA using only new materials with a shop primer applied to the exterior. Each unit is skidded for shipment and carries a full year warranty against materials and workmanship.

Blowoff Tank Sizing

1. Calculate the Cu. Ft. amount of blowoff when lowering the Boiler Water Level 4". The following formula should be used: Cu. Ft. of Blowoff = 4"/12" X Drum Dia. Ft. X Drum Length Ft.

2. Select a Blowoff Tank which has Cu. Ft. holding capacity equal to the amount calculated.If the amount of Blowoff is known select a tank with that amount holding capacity.

3. Select the drain and vent nozzles below using the Blowdown Valve Size and Boiler Operating Pressure.The inlet should be the same size as the Blowoff Valve.

Blowoff Tank Selector Chart

Tank Cu. Ft. Holding Capacity	Tank Diameter	Overall Tank Height	Tank Total Cu. Ft.	Tank Total Gallons
2.2 Cubic Feet	18"	3'	4.4	32.7
3.0 Cubic Feet	18"	4'	6	44.8
3.7 Cubic Feet	20"	4'	7.4	55.5
4.7 Cubic Feet	20"	5'	9.4	70.6
5.3 Cubic Feet	24"	4'	10.6	79.6
6.8 Cubic Feet	24"	5'	13.6	101.7
8.2 Cubic Feet	30"	4'	16.5	123.1
10.6 Cubic Feet	30"	5'	21.1	158
12.9 Cubic Feet	30"	6'	25.8	192.9
13.5 Cubic Feet	36"	5'	26.9	201.4
16.8 Cubic Feet	36"	6'	33.6	251.4
20.2 Cubic Feet	42"	5'	40.5	302.9
24.9 Cubic Feet	42"	6'	49.8	372.3
29.5 Cubic Feet	42"	7'	59.1	441.7
32.1 Cubic Feet	48"	6'	64.3	480.9
38.2 Cubic Feet	48"	7'	76.5	572
47.8 Cubic Feet	54"	7'	95.6	715.3
55.5 Cubic Feet	54"	8'	111.1	831
58.4 Cubic Feet	60"	7'	116.9	874.3
68.0 Cubic Feet	60"	8'	136	1017.5
77.6 Cubic Feet	60"	9'	155.2	1160.7
96.1 Cubic Feet	72"	8'	192.1	1437.3
109.9 Cubic Feet	72"	9'	219.8	1644.4
123.8 Cubic Feet	72"	10'	247.5	1851.5

Nozzle Selection Chart

	0-50 PSIG			51-150 PSIG			151-300 PSIG
BVD SIZE	INLET	DRAIN	VENT	INLET	DRAIN	VENT	INLET	DRAIN	VENT
1"	1"	2 1/2"	2 1/2"	1"	3"	4"	1"	4"	6"
1 1/4"	1 1/4"	3"	3"	1 1/4"	4"	6"	1 1/4"	4"	6"
1 1/2"	1 1/2"	3"	4"	1 1/2"	4"	6"	1 1/2"	6"	8"
2"	2"	4"	4"	2"	6"	6"	2"	6"	10"
2 1.5	2 1/2"	6"	6"	2 1/2"	6"	8"	2 1/2"	8"	10"

	301-800 PSIG			801-1200 PSIG			1201-1600 PSIG
BVD SIZE	INLET	DRAIN	VENT	INLET	DRAIN	VENT	INLET	DRAIN	VENT
1"	1"	3"	6"	1"	4"	8"	1"	4"	10"
1 1/4"	1 1/4"	6"	10"	1 1/4"	6"	12"	1 1/4"	6"	12"
1 1/2"	1 1/2"	6"	10"	1 1/2"	6"	12"	1 1/2"	6"	14"
2"	2"	6"	14"	2"	8"	16"	2"	8"	18"
2 1.5	2 1/2"	8"	16"	2 1/2"	8"	20"	2 1/2"	8"	24"

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