Kurimoto M-611

This is the wafer type rubber seated butterfly valve. It is manually operated and comes in both lever operated and worm gear operated types. It's nominal size ranges from 50 to 200mm. It has many applicable fluids including cold and hot water, fresh water, industrial water, air, etc. The turning of the handwheel is counterclockwise to open (Clockwise open are not available). The wafer type rubber seated butterfly valve has many features. It is made of press-formed stainless steel to have a high durability. It has a lightweight and compact design. There is good thermal insulating properties and no dewing thanks to its stainless steel construction. Consequently, lagging material and lagging work is needed little at the actuator part. Corrosive protective coating is unnecessary for its stainless steel construction. 

Kurimoto M-650 

This butterfly valve is usable under a higher pressure than the existing wafer type rubber seated butterfly valve. It is made of all stainless steel to have a high durtability. There is good thermal insulating properties and no dewing thanks to all stainless steel construction. Consequently, ;agging material and lagging work is needed little at the actuator part. It has high stray current corrosion resistance so there is no need for worry even in the connection in a stainless steel pipeline. Corrosion protective coating is unnecessary for all stainless steel construction. A low operating torque and a long life of rubber seat by adoption of the eccentric type. It is lightweight and compact, Mass - about 1/5 of that of a agte or globe valve. 

B F Kogyo M-Series

The M Series has a metal seat for high temperatures. The graphite packing has superior heat and chemical resistant properties. The packing is adjustable and can easily be replaced in situ to give a perfectly tight gland seal. The self lubricating low friction bearings are employed to prevent seizing. The thrust bearing and thrust block hold the valve disc in the right position to guarantee seat durability. The disc edge is stellite coated to considerably increase corrosion resistance and anti-wear properties. The double eccentric structure ensures better sealing with linear contact between the seat and the disc. It opens and closes with low torque. At a valve opening of 15 degrees the disc is entirely disengaged from the seat. This prevents partial wearing of the seat thus giving longer valve service life. The shaft does not penetrate the seat and so the seat can easily be replaced thanks to the self alignment seat structure. The materials of the body, disc and shaft can be chosen freely as desired. NOTE: For high temperature metal seat valves, SCPH material is used for valve body and disc. 

B F Kogyo B-Series

The B Series is an innovate product line which has succeeded in maintaining its strength and toughness while achieving far greater lightness. The double eccentric structure gives low torque and improves operational performance. The need for maintenance has been greatly reduced and low cost performance has been attained. This double eccentric principle along with BF's fine and tight manufacturing tolerances allow an equal contact between disc and seat over the broadest range of pressures and temperatures. The elasticity of seat materials coupled with the fluid flow dynamics of the double eccentric disc ensure tight shutoff. Only 15 degrees opening of the disc clears the seat. This allows clean tight shutoff, no drag or wear on the seat face. Life of the seat is extended resulting in lower maintenance costs. An improvement to torque results from double eccentric disc arrangement, as the disc is in equal balance clearing the seat. The bearings (Teflon coated stainless steel mesh) located at the top and bottom of the shaft to ensure an equal load and smooth operation of the shaft. The seat can be composed of either rubber, teflon or metal each with its own advantages. The valve is designed with space between the body and the actuator, gland packing can be "retightened" easily by gland follower with hex wrenches. The materials of the body, disc and shaft can be chosen freely as desired. 

B F Kogyo E-Series

The E Series has a tight shut off seat construction which is composed of either rubber (NBR, EPDM, VITON), Teflon or Metal (SUS403, 304, 316). The pneumatic actuator is divided up into double and single acting cylinders. The AT type is the double cylinder and the FA type is the single cylinder. Operation principle is the same for both. When air pressure enters the piston, impetus is applied to the piston. Impetus is converted to rotating torque by a Scotch Yoke. This is compact and gives large torque output. The spring return cylinder is the AS type. Operational principle is the same as the double cylinder type. In the case of right hand rotation, the valve opening and shutting are effected by the rebound of the compressed spring. Therefore this is ideal for Air Fail Close or Air Fail Open specifications. Seat replacement can easily be carried out by anybody thanks to the self-centering alignment construction. The materials of the body, disc and shaft can be chosen freely as desired. Please contact us for an enquiry/quote or further details.