COVID-19 Update: HART Unions is open for business and fully operational! Call us at 1-800-769-0503 or email us at sales@hartindustries.com.

O-Rings

Fail Safe Leakproof Reliability

At any pressure, HART O-Rings actually strengthen the seal rather than loosen it.

STANDARD O-RINGS
VViton® Florocarbon A (FKM-A)
EEthylene Propylene (EPDM)
ESHigh-Temp Steam EPDM [up to 550*F max] (EPDM E0962)
TTeflon® Tetrafluoroethylene (PTFE)
BNitrile / Buna N (NBR)
SPECIALTY O-RINGS / SEALS
NNeoprene® Polycloroprene (CR)
KKalrez® 4079 Perfluoroelastomer (FFKM)
HNHydrogenated Nitrile (HNBR)
EPNSF-61 Approved EPDM (Ethylene Propylene)
GMetallic Graphite Spiral Wound Seal
INo O-Ring (Integral Seat "Ball to Cone")
Teflon®, Viton®, Kalrez® are
Registered Trademarks from DuPont

Static

The O-ring is fitted into a machined groove between the two halves of the union. When the halves are drawn together the O-ring compresses to an ovalized cross-section, forming a positive, resilient seal which serves to block the fluid, thus sealing even at low or no pressure.


Under Load

As pressure is increased the O-ring is forced to flow and is "squeezed" into the downstream side causing the O-ring to conform to the shape of the end, blocking the groove gap. The more the system pressure increases, the more effective the seal.


Straight-Away Breakout

The flat faced construction allows for slipping the component in and out without disturbing the surrounding tube or pipe sections. Pipe alignment is much easier with Hart Unions since it is unnecessary to spring the line during make-up or disassembly.

Specialty Orders

Specialty O-Rings also available. Inquire within.

18.06.2013. 08:56