Albert Sterling & Associates, Inc.

Simplex Strainer

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KRAISSL SIMPLEX STRAINERS AND FILTERS
MODEL 72 & 72H SERIES
PRESSURE RANGE 200 TO 600 PSIG

PURPOSE
Kraissl pipeline strainers and filters protect pumps, nozzles, valves, heat exchangers and other expensive pipeline equipment from harmful flow contamination by catching dirt and debris.

APPLICATION
Kraissl Model 72 Series simplex strainers and filters provide a simple cost-effective way to separate particle impurities from fluid flow systems. Simplex models described in this bulletin are designed for applications where temporary interruption of a batch process can be permitted for basket cleaning. Where continuous, uninterrupted flow is required, our duplex strainers and filters described in other bulletins should be used. Kraissl strainers are listed by Underwriter's Laboratories, no. (U.L.) for fuel and flammable liquid service through size 4 inch, and are individually tested to U.L. quality control specifications. These cast pipeline strainers are designed and manufactured according to international standard A.S.T.M. F-1199 for use in marine and industrial applications.

DESIGN SPECIFICATIONS
Kraissl Model 72 series simplex strainers are supplied with quick-opening hand-clamp closure for pressure up to 200 psig in sizes up to six inch inclusive. Yoke closures permit easy access without use of tools. The basket is held on its seat by the cover against a spring basket handle. For higher pressure and larger sizes, our Model 72H series with stud and nut closures are available.
Strainer baskets are fabricated from perforated metal. The smallest common perforation size is 1/64 inch in brass and 1/32 inch in stainiess steel or monel. Filter baskets are manufactured with fine mesh wire cloth over supporting perforated metal. Optional patented double element baskets provide greatly increased separating area in the same space, and are easily disassembled for cleaning. Interchangeable strainer, filter and double element baskets provide a wide range of operating choices. Baskets are also available with magnet inserts to help eliminate fine metallic ferrous particles.
Internal channels in the Model 72 and 72H Series are 100% full flow. having the same cross sectional area as the equivalent pipe size to avoid flow restriction. Normal flow is through the interior of the basket which contains the collected debris when lifted out for cleaning. Where reverse flow is desired, the fluid travels from the outside to the inside of the basket, and debris collects on the basket exterior.
Both threaded-NPT port and A.N.S.I. flanged port connections are available, as well as metric flanges and other special ports. Drain plugs are furnished on all sizes. Backwash and gage taps can be installed. Weld-end ports and steam-jacketed steel models can also be provided.


SIZES AND DIMENSIONS

MODEL 72 - STANDARD PRESSURE SERIES YOKE CLOSURE
Model 72 - Threaded - NPT Ports - 200 PSIG Max. Pressure
CAST
IRON
CAST
STEEL
STAINLESS
STEEL
BRONZE
PIPE
SIZE
A
B
C
D
NET WT
LBS
72-1
72-1S
72-1SS
72-2
3/8
7 3/16
4 9/16
3 13/16
3 1/2
4
72-3
72-3S
72-3SS
72-4
1/2
7 3/16
4 9/16
3 13/16
3 1/2
4
72-5
72-5S
72-5SS
72-6
3/4
9 5/8
5 11/16
5 3/8
5
8
72-7
72-7S
72-7SS
72-8
1
9 5/8
5 11/16
5 3/8
5
8
72-9
72-9S
72-9SS
72-10
1 1/4
10 1/2
5 15/16
7
5 7/8
15
72-11
72-11S
72-11SS
72-12
1 1/2
12
7 7/16
7
5 7/8
16
72-13
72-13S
72-13SS
72-14
2
13 3/4
7 13/16
9
8 5/8
34
72-15
--
--
72-16
2 1/2
15 9/16
9 5/8
11 1/4
9 5/8
51
72-15L
72-15LS
72-15LSS
72-16L
2 1/2
16
10 5/16
9 1/4
8 5/8
42
72-17L
72-17LS
72-17LSS
72-18L
3
17 9/16
11 1/2
11 1/4
8 5/8
50

Model 72 - Flanged Ports - 200 PSIG Max. Pressure
CAST
IRON
CAST
STEEL
STAINLESS
STEEL
BRONZE
PIPE
SIZE
A
B
C
D
NET WT
LBS
72-7F
72-7FS
72-7FSS
72-8F
1
9 5/8
5 11/16
7 1/4
5
11
72-11F
72-11FS
72-11FSS
72-12F
1 1/2
12
7 7/16
8 3/8
5 7/8
21
72-13F
72-13FS
72-13FSS
72-14F
2
13 3/4
7 13/16
10 1/8
8 5/8
39
72-15FL
72-15FLS
72-15FLSS
72-16L
2 1/2
16
10 5/16
11
8 5/8
57
72-15F
--
--
--
2 1/2
15 9/16
9 5/8
13
9 5/8
66
72-17FL
72-17FLS
72-17FLSS
72-18FL
3
17 9/16
11 1/2
12 5/8
8 5/8
67
72-17F
--
--
--
3
16 1/4
10 1/8
17 3/4
9 5/8
81
72-21F
72-21FS
72-21FSS
72-22F
4
21 3/8
14 7/8
17 3/4
9 5/8
115
72-23F
72-23FS
72-23FSS
72-24F
5
22
13 1/4
18 3/4
10 7/8
172
72-25F
72-25FS
72-25FSS
72-26F
6
26
16 1/2
19 1/2
11
220
72-27FH
72-27FHS
72-27FHSS
72-28FH
8
34
21
25 3/8
14 1/2
615


MODEL 72H - HIGH PRESSURE SERIES STUD AND NUT CLOSURE
Model 72H - Cast Iron - 400 PSIG Max. Pressure
CAST
IRON
PIPE
SIZE
PORT
A
B
C
D
NET WT
LBS
72-1H
3/8
THREADED - NPT
5 7/8
4 9/16
3 13/16
3 3/4
4
72-3H
1/2
THREADED - NPT
5 7/8
4 9/16
3 13/16
3 3/4
4
72-5H
3/4
THREADED - NPT
17 15/16
5 13/16
5 3/8
4 13/16
13
72-7H
1
THREADED - NPT
17 15/16
5 13/16
5 3/8
4 13/16
13
72-9H
1 1/4
THREADED - NPT
9 13/16
7 9/16
7
5 3/8
16
72-11H
1 1/2
THREADED - NPT
9 13/16
7 9/16
7
5 3/8
16
72-13H
2
THREADED - NPT
11 1/8
7 15/16
9
6 13/16
34
72-15H
2 1/2
THREADED - NPT
12 15/16
9 3/4
11 1/4
9
51
72-15FH
3
CLASS 250 FLANGED
14 1/4
10 1/8
17 3/4
9
94
72-21
4
CLASS 250 FLANGED
19 7/8
14 7/8
17 3/4
9
134


Model 72HS - Cast Steel - 720 PSIG Max. Pressure
72-1HS
3/8
THREADED-NPT
5 7/8
4 9/16
3 13/16
3 3/4
4
72-3HS
1/2
THREADED-NPT
5 7/8
4 9/16
3 13/16
3 3/4
4
72-5HS
3/4
THREADED-NPT
7 15/16
5 13/16
5 3/8
4 13/16
14
72-7HS
1
THREADED-NPT
7 15/16
5 13/16
5 3/8
4 13/16
14
72-9HS
1 1/4
THREADED-NPT
9 13/16
7 916
7
5 3/8
18
72-11HS
1 1/2
THREADED-NPT
9 13/16
7 9/16
7
5 3/8
18
72-13HS
2
THREADED-NPT
11 1/8
7 15/16
9
6 13/16
34
72-13FHS
2
CLASS 300 FLANGED
11 1/8
7 15/16
10 3/4
6 13/16
43
72-15HS
2 1/2
THREADED - NPT
12 15/16
9 3/4
11 1/4
9
51
72-15FHS
2 1/2
CLASS 300 FLANGED
13 1/2
9 3/4
11 1/4
9
73
72-17FHS
3
CLASS 300 FLANGED
14 1/4
10 1/8
17 3/4
9
104
72-21FHS
4
CLASS 300 FLANGED
19 7/8
14 7/8
17 3/4
9
148
ALL DIMENSIONS IN INCHES, SUBJECT TO CASTING AND PRODUCTION VARIATIONS


SINGLE ELEMENT BASKETS
The open area ratios of two common perforated metal sizes are given in this table. Strainer baskets are available in many other standard perforations and meshes. Basket materials include brass, stainless steel, carbon steel, monel, and other special alloys.
BASKET
CAT.NO.
PIPE
SIZE
INTERNAL PIPE
AREA SQ.IN.
BASKET
O.D.
BASKET
LENGTH
TOTAL SCREEN
AREA SQ.IN.
OPEN SCREEN AREA
STRAINING RATIO
1/16*
1/32**
1/16*
1/32**
72-1 & 2
3/8
.191
1 1/2
2 7/8
15.3
6.1
4.3
31.9:1
22.5:1
72-3 & 4
1/2
.304
1.1/2
2.7/8
15.3
6.1
4.3
20.1:1
14.1:1
72-5 & 6
3/4
.533
1 15/16
3 15/16
26.6
10.8
7.5
20.3:1
14.1:1
72-7 & 8
1
.864
1 15/16
3 15/16
26.9
10.8
7.5
12.5:1
8.7:1
72-9 & 10
1 ¼
1.495
2 9/16
3 ¾
35.3
14.1
9.9
9.4:7
6.6:1
72-11 & 12
1 ½
2.036
2 9/16
5
45.4
18.2
12.7
8.9:1
6.2:1
72-13 & 14
2
3.355
3 ½
5 1/8
66.0
26.4
18.5
7.9:1
5.5:1
72-15
2 ½
4.788
4 1/8
6 ¼
94.4
37.8
26.4
7.9:1
5.5:1
72-15L,FL,16L,FL
2 ½
4.788
3 ½
7
86.6
34.6
24.2
7.2:1
5.1:1
72-17F
3
7.393
4 1/8
6 ¾
101
40.4
28.3
5.5:1
3.8:1
72-17L,FL,18L,FL
3
7.393
3 ½
8 ½
103
41.2
28.8
5.6:1
3.9:1
72-21F & 22F
4
12.73
4 1/8
10 ½
149
56.9
41.7
4.7:1
3.3:1
72-23 & 24F
5
20.01
6 7/8
9 ¼
237
94.8
66.4
4.7:1
3.3:1
72-25F & 26F
6
28.89
6 7/8
12
296
118
82.9
4.4:1
2.9:1
72-27F & 28F
8
50.03
9
16
516
206
144
4.1:1
2.9:1
ALL DIMENSIONS IN INCHES, APPROXIMATE
* Perforated - Based on 40% open area ** Perforated - Based on 28% open area


DOUBLE ELEMENT BASKETS

These strainers can be supplied with our patented Double Element Baskets which are easily disassembled for cleaning and provide greater straining areas in the same housing. Double Element Baskets are listed by Underwriters Laboratories, Inc. for a variety of sizes.
BASKET
CAT.NO.
PIPE
SIZE
INTERNAL PIPE
AREA SQ.IN.
BASKET
O.D.
BASKET
LENGTH
TOTAL SCREEN
AREA SQ.IN.
OPEN SCREEN AREA
STRAINING RATIO
1/16*
1/32**
1/16*
1/32**
72-7/1
1
.864
1 15/16
3 15/16
38.3
15.3
10.7
17.7:1
12.4:1
72-9/7
1 ¼
1.495
2 9/16
3 ¾
50.5
20.2
14.1
13.5:1
9.4:1
72-1 1/7
1 ½
2.036
2 9/16
5
69.0
27.6
19.3
13.6:1
9.5:1
72-13/7
2
3.355
3 ½
5 1/8
84.9
34.0
23.8
10.1:1
7.1:1
72-15L7
2 ½
4.788
3 ½
7
115
46.0
32.2
9.6:1
6.7:1
72-15/7
2 ½
4.788
4 1/8
6 ¼
121
48.4
33.9
10.1:1
7.1:1
72-17L/7
3
7.393
3 ½
8 ½
140
56.0
39.2
7.6:1
5.3:3
72-17 F11
3
7.393
4 1/8
6 ¾
141
56.4
39.5
7.6:1
5.3:3
72-21/11
4
12.73
4 1/8
10 ½
220
88.0
61.6
6.9:1
4.8:1
72-23/15
5
20.01
6 15/16
9 1/8
300
120
84.0
6.0:1
4.2:1
72-25/15
6
28.89
6 15/16
11 ½
386
154
108
5.3:1
3.7:1
72-53/15
8
50.03
9
16
649
260
182
5.2:1
3.6:1
ALL DIMENSIONS IN INCHES, APPROXIMATE
* Perforated - Based on 40% open area ** Perforated - Based on 28% open area
 

 

  

 
 

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