Y-Strainer Installation, Operation, and Maintenance (IOM) Manual
Application Y-Strainers are typically installed on the discharge side of pumps to prevent large particles from clogging or damaging downstream equipment such as spray balls, nozzles, valves and more. Operating Parameters Table 1: Maximum Operating Pressures and Temperatures
Y-Strainer Connection Sizes 1.5” – 3.0”
Y-Strainer Body Size
Tri-Clamp Type “Standard” (13MHHM)
Max. Pressure @ 250 °F
125 psi
4.0” 6.0” 4.0” 6.0”
4.0”
75 psi
200 psi 200 psi
1.5” – 3.0”
“High Pressure” (13MHP)
4.0”
Maximum Recommended Flow and Pressure Drop Table 2: Maximum Recommended Flow and Pressure Drop 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”
4.0” 4.0” 4.0” 4.0” 6.0”
70
3.2 3.3 3.4 4.8 5.1
20 / 50 20 / 50 20 / 50 20 / 50 20 / 50
130 205 300 450
1 For 70 °F Water. 2 Elements exposed to pressures above this may sustain damage.
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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.
Figure 1: Y-Strainer Elements, Mesh Overlay, and Flow Indication
Installation & Operation Y-strainers are designed for standard flow into the side inlet and out the end outlet. Perforated elements are suitable for both standard and reverse flow. Wedgewire elements or perforated elements with mesh overlays are suitable only for standard flow. Install Y-Strainer for ease of access and element removal. Use adequate piping supports to avoid overstressing 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 Y-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
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drops for each strainer size are listed in Table 2. A plugged 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.
Assembly 1. For perforated elements with mesh overlays or filter tubes, slide the overlay or filter tube over the top of the element until it is approximately centered on the element. 2. Install a sanitary gasket over the end of the strainer element and slide the strainer element into the housing. 3. Secure with a sanitary clamp. 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. Disassemble the strainer by removing the end cap clamp and pulling the element out. Remove mesh overlay if present. 5. Use a hose to spray the insert off with water to remove loose debris. 6. Clean the insert 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. 7. Rinse with appropriate water supply and inspect all parts for cleanliness and damage. 8. 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. Inspect for cuts, abrasions, tears, holes, deformity, or other visible damage. Replace as necessary or no longer than a recommended annual basis.
Figure 2: Exploded Y-Strainer View
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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.
Troubleshooting Table 3: 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 perforation holes 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). 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
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