FLOWSERVE Precision Machined Oil Resistant Flow Pump Spare Parts Flange Gasket

Customers often start with a request for one sealing component, but end up needing the complete set of spares for the same pump — gasket, mechanical seal, wear rings, bearings, and shaft sleeve. Rather than placing separate orders with five suppliers and managing five shipping schedules, they can route everything through a single point of contact with us. Our supply scope includes centrifugal pump parts, variable-frequency drives, servo control systems, HMI and PLC units, motor control cabinets, electric motors, mechanical seal cartridges and support systems, flexible shaft couplings, and gear speed reducers. For pump replacement projects at overseas locations, we can send personnel to site for 3D laser scanning of worn components and provide commissioning supervision after the new parts are installed.

FLOWSERVE Flange Gasket sits between two mating flange faces in the pump discharge or suction piping and has one function: keep the pumped fluid inside the system. The challenge is that the gasket must maintain that seal while the flange temperature cycles, the bolt load relaxes over time, and the internal pressure fluctuates with pump start-stop events. If the gasket loses its sealing stress at any point during those cycles, the result is a visible leak or, in the case of hazardous media, a safety incident.

Gasket failures in pump service generally fall into four categories: compression set (the material takes a permanent deformation and cannot recover when the joint unloads), chemical degradation (the fluid attacks the binder or the filler, causing the gasket to soften or disintegrate), thermal damage (overheating chars organic binders or causes differential expansion between the gasket and flanges), and blowout (the internal pressure exceeds the residual clamping force and the gasket extrudes out of the joint). Which failure mode applies tells us what material and gasket construction to use for the replacement.

We produce replacement flange gaskets based on actual flange dimensions taken from a sample, a drawing, or a 3D surface scan. For standard ANSI and DIN flanges we hold reference data that covers the most common pump connection sizes. For non-standard or older pump models, we measure the flange face OD, the bolt hole circle, the gasket seating surface width, and the bolt hole diameter, then fabricate the gasket to match. Gasket types we supply include flat sheet, spiral-wound with inner and outer rings, ring-type joint (RTJ) for high-pressure flanges, and grooved/profile designs for critical sealing applications.

• Dimensions from a Physical Sample — We can measure and reproduce the gasket from the used part or from flange face impressions; no OEM drawing is required for standard flanges
• Material Range Covers Most Services — Carbon steel for general water, stainless and duplex for corrosive environments, alloy steel for high-temperature circuits — each matched to the pressure class and temperature rating of the flange pair
• High-Pressure Designs Available — Spiral-wound and ring-joint gaskets produced to ASME B16.20 and API 601 standards for Class 600 and above flanges
• Media-Specific Guidance — If you are unsure which gasket material suits your fluid, let us know the chemical composition, temperature, and pressure; we will recommend the gasket style and material grade
• Fast Turnaround on Common Sizes — Standard ANSI and DIN flange gaskets can be cut from stock sheet material within 1–2 working days
• Inspection Before Dispatch — Dimensional check against the flange drawing or the measured sample, material certificate verification, and surface condition inspection are completed before packing