The new Elesa HVF in-line visual flow indicators compliment their well-known range of hydraulic accessories. These indicators are a simple, cost-effective means of checking correct operation of many fluid systems and so protecting associated equipment from the consequences of flow stoppages.
The HVF may be mounted in any position where it offers a 360° view. This simple, cost-effective and maintenance free unit operates with flow in either direction, while its unusual axial impeller design ensures minimal pressure loss in use.
Operation at up to 100°C working temperature and application with a wide range of liquids - including glycol based solutions, is ensured by its rugged construction in Pyrex and polypropylene.
AISI 316 stainless steel bosses, NPT conical threads and blue rotor options are available on request.
The secret life of a London Music Hall
Does anyone know when electric lighting was first used in Wiltons. I presume it was installed on the stage first and then backstage later? Or was it...