HNBR O-Rings 90 Shore A H2S Resistant for Drilling Mud Pump and Fluid End Seal Applications

HNBR O-Rings for Drilling Mud Pump and Fluid End Seal Applications

HNBR (hydrogenated nitrile / HSN) O-rings with nominal 90 Shore A hardness are offered for drilling mud-pump and fluid-end sealing requirements. Match the ring size and gland dimensions to the equipment drawing, and specify mud composition, solids content, pressure and temperature for compound selection. Gas-service requirements must be reviewed for the specific compound and operating conditions.

Features

• Nominal 90 Shore A hardness for equipment-specific sealing requirements
• Sour-service qualification specified and reviewed for the selected compound
• Compound selection considers heat, tear and abrasion requirements
• Better ozone and weather aging than standard nitrile
• Review extrusion clearance and backup-ring requirements for the gland

Applications
Mud-pump and fluid-end seal replacement, and other drilling-tool applications requiring HNBR O-rings. MWD/LWD, downhole, wellhead or pressure-control use requires the equipment-specific drawing, service requirements and applicable qualification.

FAQ

Q: Why HNBR 90 instead of NBR for drilling tools?
A: Compare the specified compound properties with the mud chemistry, temperature and wear requirement. HNBR and NBR grades should be selected from compound-specific data rather than polymer names alone.

Q: Is it rated for H2S and sour service?
A: The HNBR name and hardness do not establish sour-service qualification. Specify gas composition, pressure, temperature, decompression conditions and required qualification tests for compound review.

Q: How does it stand up to abrasion?
A: Include solids concentration, particle conditions and existing seal wear with the inquiry. Pressure, extrusion gap, temperature and compound properties guide the gland and backup-ring review.

Q: When would I pick FKM over HNBR?
A: Compare the specific HNBR and FKM compounds against fluid chemistry, temperature range, mechanical loading and the required tests. Provide the equipment material specification where available.

Q: What sizes and options are available?
A: Send an AS568 dash number or metric inner diameter and cross-section. Include quantity, hardness tolerance, drawing and any material or inspection requirements for a quotation.