Increase Versatility and Improve Function with
Using sight glasses is essential in the production of pharmaceuticals, as is maintaining the functionality and cleanliness of those sight glasses. The good news is that a wide variety of sight glass accessories are available to assist pharmaceutical manufacturing personnel in the production of pure, high-quality product in every batch.
Sight glass wipers aid visibility by cleaning the inside glass surface of light ports and sight ports. Wiper assemblies must be constructed of high-grade stainless steel with either Teflon or silicone blades and work in conjunction with a spray ring or set of spray nozzles. They come in two types.
When a higher-pressure sight glass requires cleaning, the Type sw II manual wiper, in conjunction with a DIN28120 sight glass, must be used. Type II wipers require a threaded bore hole through the sight glass cover and weld pad for proper installation. Type II wipers can operate at temperatures of up to 220 C and pressures as high as 16 bar – 235 psi.
- Sight glass wipers can be motorized and automated.
- Constructed in both explosion-proof and non-explosion-proof models, the explosion-proof models are rated to EEx d IIC T5 (Zones 1 & 2 and 21 & 22) and are able to operate in ambient temperatures ranging from minus 15 C to 50 C.
- Motors generally fit specific types, sizes, and brands of wipers, and operate on a variety of direct and alternating currents.
In many cases, however, the remote observation of reactors, e. g. via Lumiglas camera technology, is mandatory, making it essential to install a motor-driven wiper that can be actuated remotely from the control room.
The Ex motor drive EMA I-Ex has been developed specifically for such applications.
Because remote observation is mainly carried out in potentially
explosive environments, an Ex-class motor drive is now available in addition to the Ex camera
Biogas Sight Glass with Light, Wiper and Camera System
Biogas sight glass for digester tanks and methane digester tanks. Our sight glass gasket creates a gas-tight seal by conforming to cement walls and ports used in digester tank construction.
Spray Rings and Nozzles
Sight glass wipers operate together with a spray ring or spray nozzles to achieve effective cleaning. The spray ring must fit ANSI flange connections for use in intermittent or continuous pressure-cleaning operations. For versatility, the ring delivers a variety of spray media, including fluid or air. The rings can include varying numbers of spray nozzles depending ring diameter. They are also available in different materials and sizes for diverse applications. Materials used include carbon steel, stainless steel, Hastelloy, and other alloys. Temperature and pressure ratings vary depending on the ring material and ANSI-rating.
Sight glass light timers are convenient where illumination is limited to a specific period. A timer switches lights on and off automatically, reducing power consumption and heat build-up, and providing improved lamp life. Timers fit either externally to, or internally within the containment vessel, can operate in hazardous and non-hazardous conditions, within a wide temperature range, and at a variety of voltages.
Use of the wide variety of available sight glass accessories can significantly improve the drug manufacture process.