보온 볼밸브 모델 조회
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설계원에서 제공한 자료표에 나와 있는 단열 볼밸브의 모델명은 BQ41PPL-16C-65입니다. 중간에 있는 PPL이 무엇을 의미하는지 잘 모르겠습니다？답을 구합니다.
PPL 공중합 폴리벤젠은 고온에 강한 플라스틱으로, 폴리테트라플루오로에틸렌보다 훨씬 비쌉니다
이것이 밀봉 패드의 재질인가요?？
감사합니다:handshake
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