| Y-type strainer | A screen sits in an angled branch of the Y-shaped body and retains debris as fluid passes through. | Liquid, gas, and steam lines where a compact inline unit is useful. | Compact, versatile, and available in a broad range of materials and pressure classes. | Check screen access and cleaning frequency; the debris pocket may require periodic shutdown or isolation for service. |
| Simplex basket strainer | Fluid flows through a removable basket element housed in a larger chamber. | Liquid lines with moderate or heavier solids loading and room for a larger strainer body. | The basket can provide more debris-holding capacity than many compact strainers. | Typically requires flow interruption or a bypass during basket removal unless the system has another arrangement. |
| Duplex basket strainer | Two strainer chambers are connected through a changeover valve so flow can be directed through one chamber while the other is cleaned. | Continuous-duty liquid services where stopping flow for routine cleaning is undesirable. | Allows one basket to be serviced while the other remains in operation, when properly operated. | Confirm changeover-valve design, chamber sizing, venting, draining, and safe maintenance procedures. |
| T-type strainer | A screen is fitted inside a tee-shaped body, with a removable cover or closure for access. | Large-bore or high-capacity lines, including installations where piping layout favors a tee body. | Can be configured for larger pipelines and substantial flow capacity. | Allow adequate space to remove the screen and verify the pressure drop at the required flow rate. |
| Temporary conical strainer | A cone-shaped screen is installed between flanges to catch construction debris during commissioning or initial operation. | Pipeline flushing, startup, and commissioning, where temporary protection is specified. | Simple temporary protection against scale, weld slag, and other installation debris. | Not generally intended as a permanent strainer; monitor pressure drop and remove it according to the commissioning plan. |
| Automatic backwashing strainer | A control system initiates a cleaning cycle that reverses flow locally or uses a directed flush to remove accumulated solids. | Continuous liquid processes with recurring particulate loading and limited manual-cleaning access. | Can reduce routine manual cleaning and maintain operation through automated cycles. | Requires suitable controls, a cleaning discharge arrangement, and solids that the cleaning cycle can dislodge. |
| Mechanically cleaned scraper strainer | A moving scraper or cleaning element removes deposits from the screening surface, often discharging them through a purge connection. | Liquid services where sticky or fibrous debris can build up on a screen. | Provides active cleaning for applications where passive screens may foul quickly. | Moving parts need maintenance; confirm that the debris type and process conditions suit the cleaning mechanism. |
| Steam strainer | Usually a Y-pattern unit with a screen and a blowdown connection arranged for steam-line service. | Steam lines upstream of control valves, traps, meters, and other equipment sensitive to debris. | Helps intercept pipe scale and other particles in steam service; blowdown can assist with debris removal where designed for it. | Install in the orientation specified by the manufacturer and account for condensate drainage, thermal conditions, and safe blowdown. |
| Fabricated large-bore basket strainer | A purpose-designed housing holds a removable screen basket sized for a large pipeline or specific process duty. | Water intake, cooling-water, and other large-flow liquid systems. | Can be engineered for large flow rates, site-specific connections, and substantial debris capacity. | Review structural design, screen support, lifting and access requirements, corrosion resistance, and pressure-drop data. |
| Duplex Y-type strainer arrangement | Two Y-type strainers are installed with suitable isolation and changeover piping so one can be cleaned while flow uses the other. | Continuous-operation services where a compact strainer body is preferred and planned changeover piping is feasible. | Provides a maintainable alternative to a single inline strainer when flow interruption must be minimized. | The complete piping and valve arrangement must support safe changeover and prevent unintended flow interruption. |