Under silo special knife gate valve

GENERAL CHARACTERISTICS

General construction is similar to VG standard knife gate valve but specially developed for working under silo.
The face to face of the under silo special knife gate valve is more important than VG standard knife gate valve. This results in following advantages :
– The gate is guided by fingers, which reduce frictions and allow the product to go down without accumulating in the clearances of the body. This avoids the jamming of the gate.
– The recommended direction for the assembly of the under silo gate valve is with the seat gasket on the product side. The body in this position, channels the fluid limiting so its accumulation in the hollow zones. It is also possible to install reinforced seats which act equally as deflectors.
– The attack of the gate is straight with a chamfered extremity for a better penetration in the product.
– The blowing orifices in the body are foreseen in standard to inject compressed air of weak pressure (< 1 bar) preventing the stuffing and the accumulations of product.

Knife gate valve

GENERAL CHARACTERISTICS

BODY’S CONSTRUCTION
– Cast iron, stainless steel, aluminium or aluminium hard anodised (resisting to abrasion, avoids forming of alumina in surface).

– Temperatures:
. Nitrile: 80°C,
. EPDM: 110°C.

 AGREEMENT AND TESTING
– Manufacture according to the requirements of the European directive 97/23/CE «Equipments under pressure» : category III modulate H (from DN 50 to DN 600).
– Test procedures are established according to NF EN 12266-1, NF EN 12266-2, DIN 3230 and ISO 5208.

 CONNECTION
Between flanges PN 10 following NFE 29203 – BS 450 – ANSI B 16-5 – option ASA 150.

 FACE TO FACE
According to TECOFI’s standard.