Pump housing O-rings, matched to your actual seal.
Replacing a casing or cover seal? Start with the correct ID × cross-section, then check the groove, fluid, temperature and compression. Browse a listed size or send us a non-standard requirement.
Static joint · Exact fit requires real dimensionsThree ways to get the right O-ring
Choose the purchasing route before going through detailed engineering checks.
I know the dimensions
Search by measured inside diameter and cross-section. Verify the exact product material, hardness and packaging.
Find a listed O-ring →I need custom or bulk supply
Send a drawing, required quantity, material preference and operating conditions for a quotation.
Request a quote →The old ring is damaged
Check the gland and mating hardware before assuming the failed O-ring still has its original dimensions.
Review the inspection checks →Four checks before ordering
These are screening checkpoints, not product approvals or universal design limits.
Ring and groove
Inside diameter, cross-section, units and actual gland geometry.
Housing and cover
Static faces, compression, clearance, alignment and installation edges.
Fluid and temperature
Actual process media, additives, cleaners, temperature and pressure changes.
Grade and quantity
Material and hardness if known, required count and any product-level documentation.
When a pump housing O-ring leaks
Damage is a clue for investigation, not proof of one root cause.
Check the assembly first
- Seepage: inspect mating faces, cover or bonnet alignment and gland geometry.
- Flattening: review compression, temperature, time and compound recovery.
- Cuts or extrusion: check installation edges, clearances and service pressure.
Choose a defensible buying route
Known exact dimensions? Check listed material and hardness. Unknown geometry or compound? Send drawings, photos, operating conditions and quantity for engineering review.
Request application review →Short answers before you buy
Should a pump housing O-ring be selected differently from a shaft seal?
Yes. Housing and cover joints are generally static, while rotating shaft locations may require a different sealing design.
Can pressure alone determine the correct O-ring?
No. Geometry, material, temperature, clearance, compression and pressure must be considered together.
What if the original O-ring size is unknown?
Send photos, drawings or groove measurements, along with the fluid, temperature, pressure and order quantity. An engineering quote can be used when no listed size is confirmed.
Engineering screening reference only. This page does not certify a material, compound, grade or application fitness. Compare the specific product listing and required technical documents before ordering. Technical Sources & Review Policy.