Osaka Gas Network Co., Ltd.Osaka Gas Network Co., Ltd.
Daigas Group The Osaka Gas Group has taken a new step forward as the Daigas Group.

Gas distribution

Compact Fuse Valves for Expansion

Overview

These are the smallest case-type fuse valves for expansion in the industry, which ensure workability and operability.
* Fuse valves for expansion refer to dedicated gas valves that can be newly installed even if no gas valves are in place.Installation of fuse valves enables the use of fan heaters (FHs) and other appliances.

Features

Compact (smallest size in the industry)

  • The installation area has been significantly reduced.(Top connected type: 43.5% reduction; rear connected type: 49.0% reduction)

Workability

  • Construction is completed just by fastening screws.(Workability is as high as for conventional products.)

Operability

  • The connector can be removed by pushing down the side face of the case.(Top connected type)
  • The connector can be removed by pressing the button on top of the case.(Rear connected type)

Sophisticated design

  • It is designed to be compatible with indoor power sockets and walls.(The color is white.)
The characteristic points of compact Fuse Valves for Expansion

Background purpose

A case-type fuse valve can be installed on the wall surface for expansion. The conventional fuse valve was designed to cope with piping routes in two directions (top side and rear side) with a single product. This offered an advantage in terms of preparation of materials, but the product was bulky.Thus, we reviewed the structure of the fuse valve main unit and the mechanism to attach and remove the connector. Dedicated products were developed for connection on the top side and rear side to achieve downsizing.

Key points in the development

For top side connection

The straight-type fuse valve,* which was developed in 2014, is used as the main unit. The mechanism to attach and remove the connector by pushing down the side face of the case has achieved downsizing while ensuring operability.
* The development of a safety mechanism, which was used in the conventional L-type fuse valve (refer to the table below), has made it possible to align the inlet side of the fuse valve with the outlet side. This structure enables installation in a narrow space.This compact design has been applied to the case-type fuse valve.

For rear side connection

A conventional L-type fuse valve was installed in parallel with the wall surface. Vertical installation on the wall surface has been achieved for rear side connection. The attachment and removal mechanism by using the push button on the top has achieved downsizing while ensuring operability.

The inner structure ofcase-type fuse valves
conventional product
The inner structure ofcase-type fuse valves
Top connected type
The inner structure ofcase-type fuse valves
Rear connected type

Commendation

Straight fuse valve: Technology Award of the Japan Gas Association in 2016