Angle-Line Strainers Installation, Operation, and Maintenance (IOM) Manual
Application Angle-Line Strainers are typically installed to isolate a low volume of product particulates or contaminant debris from process streams without incurring substantial pressure drop. The component allows the use of many straining options all within the same housing, eliminating mechanical modifications in the field when process requirements change. Angle-Line Strainers minimize downtime, allowing the element to be removed for cleaning without removing the entire strainer body from the process line.
Operating Parameters Table 1: Maximum Operating Pressures and Temperatures AL Strainer Body Size AL Strainer Connection Sizes
Tri-Clamp Type “Standard” (13MHHM)
Max. Pressure @ 250 °F
125 psi
4.0” 6.0” 4.0” 6.0”
1.5” – 4.0” 3.0” – 6.0” 1.5” – 3.0”
75 psi
200 psi 200 psi
“High Pressure” (13MHP)
4.0”
Maximum Recommended Flow and Pressure Drop Table 2: Maximum Recommended Flow and Pressure Drop – “Standard Flow” Direction Connection Size Body Size Max. Recommended Flow (gpm) Pressure Drop @ Max. Recommended Flow 1 (psi)
Max. Allowable Pressure Drop Across Element – Perf. / Wedgewire 2 (psi)
1.5” 2.0” 2.5” 3.0” 4.0” 3.0” 4.0” 6.0”
4.0” 4.0” 4.0” 4.0” 4.0” 6.0” 6.0” 6.0”
55
2.2 1.9 2.9 6.0
20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50
105 165 245 330 245 465 790
10.0
1.6 4.7
10.0
1 For 70 °F Water. 2 Elements exposed to pressures above this may sustain damage.
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Table 3: Maximum Recommended Flow and Pressure Drop – “Reverse Flow” Direction
Max. Recommended Flow (gpm)
Pressure Drop @ Max. Recommended Flow 1 (psi)
Max. Allowable Pressure Drop Across Element – Perf. / Wedgewire 2 (psi)
Connection Size
Body Size
1.5” 2.0” 2.5” 3.0” 4.0” 3.0” 4.0” 6.0”
4.0” 4.0” 4.0” 4.0” 4.0” 6.0” 6.0” 6.0”
55
2.2 1.9 2.0 3.4 7.5 1.7 4.8
20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50 20 / 50
105 165 245 430 245 510 840
10.0
1 For 70 °F Water. 2 Elements exposed to pressures above this may sustain damage.
Safety Precautions 1. Do not exceed temperature or pressure rating of strainer assembly. 2. Do not loosen or remove any clamps while the strainer is under pressure. 3. Lockout supply pump(s) and other equipment in-line with the strainer during cleaning to prevent accidental operation when strainer is open. 4. Use protective gloves when removing strainer element and clearing debris from element. 5. Use only Sani-Matic replacement parts.
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Figure 1: Standard and Reverse Flow Diagrams
Installation & Operation Angle-Line Strainers can be designed for standard flow into the end of the strainer or can be designed for reverse flow into the side-inlet and out the end (See Figure 1). If you want to switch flow directions of the strainer, the same strainer body and element can be used with different frame and intervals – see the latest catalog for information. Strainer assemblies are designed to allow particles to be collected on the outside of the strainer element. Correct flow direction is indicated by the arrow on the side of the housing. Install strainer for ease of access and element removal. Use adequate piping supports to avoid over- stressing strainer fittings. Add isolation valves downstream and/or upstream of the strainer to allow opening and manual cleaning of the element without draining the entire line. As the Angle-Line strainer becomes plugged with debris, differential pressure across the strainer increases. Monitor pressure drop during system operation using pressure gauges or sensors installed on both sides of the strainer. Maximum allowable soiled strainer pressure drops, and approximate clean pressure drops for each strainer at their maximum flow rate size are listed in Tables 1 and 2. The latest version of the catalog also published Cv values, which can be used to calculate pressure drop at other flowrates. A soiled strainer may completely block flow resulting in a strainer differential pressure equal to the dead-head pressure of the system pump, which could lead to damaged strainer components. To clear a plugged strainer, refer to the cleaning section.
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Assembly Angle-Line Standard Flow Strainer (End Inlet)
1. Install a gasket onto frame. 2. Install an O-Ring onto the O- Ring retainer (welded to frame). 3. If using a mesh overlay or filter
Figure 2: Angle-Line End-Inlet Strainer (Standard Flow)
tube, slide it over the strainer element.
4. Place element over frame. 5. Place end plug over frame and element, centering the cap in the element. 6. Place retaining clip connection into hole in frame, positioning clip perpendicular to the frame. 7. Feed retaining clip through the hole, keeping it perpendicular to the frame until the clip center position is in the frame hole. 8. Compress cap to the element by swinging the retaining clip down over element. The element should no longer move freely in the cap and frame. If there is free movement clip may need to be replaced, as it will wear over time with use. 9. Disassemble by reversing the above listed steps. Note that the retaining clip should always be installed and/or removed in a perpendicular position to the frame. Failure to maintain a perpendicular position could result in damaging/bending the clip, preventing proper compression of the cap to the element. Angle-Line Standard Flow Strainer (End Inlet) 1. Install a gasket onto frame. 2. If using a mesh overlay or filter tube, slide it over the strainer element. 3. Place element over frame. 4. Install an O-Ring onto the O-Ring retainer.
5. Place the O-Ring retainer over the frame, centering the element in the retainer and frame. 6. Place the bent side of the retaining clip into the hole in the frame, positioning retaining clip perpendicular to the frame. 7. Feed the retaining clip through the hole, keeping it perpendicular to the frame and aligning with the grooves on the retainer, until the retaining clip center position is in the frame hole. 8. Compress the retainer to the element by moving clip over the bar of the frame. The element should no longer move freely in the O-Ring retainer and frame. If there is free movement, the retaining clip may need to be replaced, as it will wear over time with use. 9. Disassemble by reversing the above listed steps. Note that the retaining clip should always be installed and/or removed in a perpendicular position to the frame. Failure to maintain a perpendicular position could result in damaging/bending the clip, preventing proper compression of the cap to the element.
Figure 3: Angle-Line Side-Inlet Strainer (Reverse Flow)
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Cleaning* 1. Turn off and lock out any pumps and/or
equipment connected to the strainer process line.
2. Ensure that all pressure has been relieved from the system the strainer is installed on. 3. Close any available blocking / isolation valves. 4. Remove and disassemble the strainer internals. 5. Remove mesh overlay / filter tube if present. Mesh overlay can be cleaned; discard filter tube after each use. 6. Use a hose to spray the insert off with water to remove loose debris.
Figure 4: COP Parts Washer Cleaning
7. Clean the insert and other internals using a clean-out-of-place (COP) parts washer or other automated system running at an adequate temperature, chemical concentration, and amount of time to remove all soil residue. If automated cleaning is not available, manually clean soil residue off the element using a scrub device, water source, chemical and gloves. 8. Rinse with appropriate water supply and inspect all parts for cleanliness and damage. 9. Reassemble the strainer as described in the assembly section. *These are recommended cleaning instructions only. Follow any plant sanitation standard operating procedure (SSOP) that your facility may have in place. A tri-clamp cap can be attached to the strainer body, which can then be cleaned-in-place (CIP) if desired during COP of the strainer element. Maintenance During normal disassembly, cleaning, and reassembly, inspect the key areas of the strainer that may require maintenance: 1) Soil. Inspect for soil particulates or foreign matter caught in the element. Remove as necessary. 2) Tri-Clamp Gasket / O-Ring. Inspect for cuts, abrasions, tears, holes, deformity, or other visible damage. Replace as necessary or no longer than a recommended annual basis. 3) Element. Check for bent components, abnormal holes, or other wear and tear or damage. Replace as necessary. 4) Mesh Overlay (if applicable). Inspect for tears or other damage. Replace as necessary or no longer than a recommended monthly basis. Higher mesh sizes (finer mesh) may require more frequent replacement. 5) Filter Tubes (if applicable). Inspect for tears or other damage. Filter tubes are considered “single-use” and should be replaced in between each production run and/or cleaning procedure. Remove and clean the strainer element at least once per shift. More frequent removal and cleaning may be required with heavier soils.
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Troubleshooting Table 4: Troubleshooting Problems
Solutions
1. Damaged element (replace). 2. Damaged housing (replace).
Element won’t fit into housing
1. If the debris is smaller than the perforation size, then a new element insert with smaller openings will be required. 2. A different straining element (perforated, wedgewire) may be required. 3. If present, the mesh overlay or filter tube may be damaged (replace). 4. The element may be damaged (replace). 5. The overall assembly may be loose – check retaining clip, O- ring, and end plug for fit up. 1. Strainer element size may be too small (use a larger element size). 2. The strainer is not cleaned out adequately during cleaning steps. 3. A dual strainer assembly may be required to switch between strainers and continue running while one strainer is being used (contact Sani-Matic for more information). 1. Tighten clamp. If leakage is still occurring replace the tri- clamp gasket. 2. Check the system temperature and pressure to ensure the pressure does not exceed the pressure ratings.
Particles are passing by the strainer.
Strainer is plugging frequently.
Leakage occurring at clamp connections
Hygienic Component Solutions Catalog For latest technical, part number, and spare parts information, see our latest catalog:
Hygienic Component Solutions Catalog
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