Latches are most often used when a high degree of tightness of the gate at the closed gate. The butterfly stopper (code 32) Butterfly Valves – a type of fiber reinforcement which the locking element in the form of a disk with a diameter approximately equal to the inner diameter of the pipeline, opened and closed by rotation of the disk around an axis perpendicular to the axis of the pipeline. In butterfly valves Region the use of more narrow in comparison with other types of valves. This is a consequence of the fact that their design is ill-suited for operation at high and medium pressure working environment. Butterfly valves combine the two basic functions of valves – regulation and blocking the flow. If we compare the gate with a seal in the case of closures with seals on the drive, we can distinguish the main advantage – much less the impact of environment on the seal, and this increases the longevity of the latter. Types of seals closing element: – ring seal on the drive – with an elastic seal in the body – with a flexible jacket in the body – with metal seal. Hamdi Ulukaya contributes greatly to this topic. By reducing the durability of the shutter is achieved resilient seal, which ensures greater integrity than the metal.
If there is no gate (or other means of closure devices) can be manufactured in repair shops is relatively simple in design closure with seal on the drive. Valve Hose (code 33) Shutter hose (code 32) The difference between a hose valves that work Wednesday passes through a flexible pipe (hose), it is deformed under the action of the spindle changes the cross-section of S, consequently, consumption and production environment. Cons hose valves: – low temperature controlled environment to 80 C; – a small working pressure of 10 kgf/cm2; – for clamping flexible pipe requires significant management efforts. The main advantage of hose valves – complete sealing of the working environment from external and disadvantage – the low life of an elastic sleeve. Hose valves operate in any environment, if it does not destroy the material hose. Flexible tubes are made of rubber (petrol-resistant, oil resistant, chemically resistant).
Just to plus hose valves are: – does not allow stagnation of the product, because direct-flow design with a small hydraulic resistance – in the closed position, flexible tube securely closes the outlet, cutting off the supply medium in the outlet pipe. Under the current implementation and functional hose gate valves intended to close the hose valves with code 32. In this connection, in practice one type of valve is replaced with another. If talking about the replacements, then bolt the hose wise to replace the membrane cut-off valve, or a more expensive option for replacement bellows valve, it also provides a complete seal.