公开(公告)号：US20190203850A1

公开(公告)日：2019-07-04

申请号：US16314161

申请日：2017-06-13

Applicant: GRUNDFOS HOLDING A/S

Inventor： Ole HANSEN ,  Søren Søgaard JENSEN

IPC: F16K31/60 ,  F16K5/04 ,  F24H9/20

CPC classification number: F16K31/602 ,  F16K5/0442 ,  F24H9/06 ,  F24H9/2007

Abstract: A construction unit (1, 2) forms part of a gas heater and includes a valve (9) which is actuatable by way of a stem (10). The stem (10) includes positive-fit device. The stem (10) is controllable from the outside via a tool which can be brought into engagement with the positive fit device. A detent engagement device (18, 27) holds the tool (21) in engagement with the stem (10), so that the valve is controllable without the aid of outside tools.