ECOLINE GLB 800

– Leak-free stem seal

– Primary sealing to atmosphere is provided by a multi-walled metal bellows welded to the stem and a graphite gasket between body and bonnet.
– Secondary sealing of the stem passage to atmosphere is provided by a minimum of five graphite packing rings plus lower gland section for added safety.
– In the event of a ruptured bellows, fluid leakage along the stem passage is temporarily contained by the integral back seat.

– Longer service lives of valve and bellows

– Specially designed multi-ply stainless steel bellows offers excellent corrosion resistance and flexibility; designed to withstand 1.5 times the nominal valve pressure.
– Thanks to its position well outside the flow path, the bellows is not exposed to abrupt changes in fluid pressure which could result in lateral deformation and subsequent failure.
– The valve disc is accurately guided along the inner body wall, resulting in a straight movement of the stem and bellows without seizing or jamming.
– The guide pin on the stem moves in a groove in the bonnet, ensuring straight, non-rotating movement of the stem and bellows and preventing circumferential deformation at the bellows.
– Stellite hard-facing applied to the seating surfaces of the seat rings and the valve disc prevents the valve disc from seizing on the seat rings and reduces wear. A minimum hard-faced layer of 1.6 mm is retained after machining.

– Reliable leakage protection of body

– Integrally forged extension; no further potential leakage points (compared to welded design).
– Valve body with integrally forged flanged ends withstands higher pressures than body with welded flanges.
– Gaskets are fitted above and below the end fitting of the bellows assembly and firmly compressed by a set of bolts. The lower gasket is confined by the body shoulder and the end fitting of the bellows to prevent excessive compression.

– Ease of service without additional costs

– No costs for daily or frequent maintenance work during valve duty thanks to reliable bellows seal between the stem and the body.
– If required, a leakage monitoring hole can be provided in the gland packing area.
– The bolted bonnet and the design of the stem and bellows assembly enable straightforward dismantling in the event that defective internal components need to be replaced.
– Damage on valve disc can easily be remedied due to the “T”-shaped connection between valve disc and stem.

– Operating reliability

– Standard travel stop prevents excessive valve travel which could destroy the bellows or reduce the expected service life of the bellows.
– Anti-blow out stem design prevents stem from being blown out of the valve body under high internal valve pressure.

– Suitable for various installation positions

– Design with valve disc accurately guided in the body enables special installation positions (in vertical pipes or with inclined but upward stem position).

– Available for all kinds of fluids

– Several material variants available for body and bellows to suit a variety of fluids and applications.

Globe valve

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Declaration of conformity (0570.8540_EN)