Polywater | Hauff Technik PHRD Mechanical Seal
Polywater announces UL approval for conduit mechanical sealant line PHRD in the U.S.
FOR IMMEDIATE RELEASE
Polywater announces UL approval for conduit mechanical sealant line in the U.S.
(Stillwater, MN June 24, 2020) — Polywater announces that its Polywater | Hauff-Technik mechanical
seals have been certified by Underwriters Laboratories (UL) to meet the requirements of Outlet
Bushings and Fittings (QCRV). The PHRD seals are considered watertight and approved for use under
NEC articles 230.8 and 300.5 (G), which govern the sealing of raceways entering a building or
Polywater | Hauff-Technik PHRD conduit seals are the most diverse mechanical seals on the market.
They can be designed to seal around any size and configuration of cables or pipes and can be
manufactured for core-drilled holes or conduits with diameters of 1.5 inches to several feet. EPDM
rubber was used for the seals tested by UL, but additional rubbers are available for other applications.
The PHRD mechanical seals are suitable for use in Class 1 Division 2 hazardous locations as defined
The innovative one-piece, split design provides a simple, labor-saving sealing solution for cables or
pipes that are already laid or newly laid. Stainless steel pressure plates and bolts provide durability in
corrosive environments and are rodent resistant. Reliability, labor saving, and durability are criteria
engineers and contractors demand when sourcing mechanical seals.
“We are pleased to obtain this certification. The UL mark represents rigorous testing that assures both
the quality and safety of our product.”, says Sheri Dahlke, technical director. “This gives our end users
the confidence of a third-party certification. Providing airtight and watertight seals for these industries is
critical to engineers’ needs for reliability while meeting industry guidelines,” according to Dahlke.
Polywater, a leading specialty chemical manufacturer for the electrical and telecommunications
industries based in Stillwater, MN, collaborates with Hauff-Technik Gmbh & Co. KG, based in
Hermaringen, to provide the Polywater | Hauff-Technik line of sealing systems to the U.S. market.
Helping realize a better-connected world. Polywater helps companies in the electrical and
communications industries find better ways to overcome specific, field-based infrastructure challenges.
For more information visit polywater.com.
Always. Reliable. Tight. Hauff-Technik is among Europe’s leading manufacturers of cable, pipe and line
entries. We are a full-service provider of completely reliable sealing systems and find the best possible
solution for every requirement. Including yours. For more information visit hauff-technik.de/en/.
Erik Freyser, president, Polywater
Email Media Requests