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Saunders Type KB

A valve package for corrosive and abrasive applications


Saunders KB Type

With a wide choice of materials, methods of operation and body end connections, the Saunders straight through type KB diaphragm valves meet the needs of most industrial applications. Extended life, reliability, safety and ease of use, combined with essential simple design, result in low maintenance for minimum running costs. The Saunders Type KB diaphragm valves (DN15-DN350) positively benefit your bank balance with a unique range of features.

  • Straight through body, high flow, low pressure drop
  • Low maintenance
  • Rising handwheel indicator (optional)
  • Immediate indication of open/close position
  • Leak tight by design
  • Flexible closure een with solids present
  • Only body and diaphragm are in contact with the media
  • Specially developed linings and diaphragms available
  • Indicator sleeve (lubrication reservoir)
  • Rolled thread spindle
  • More compact than the previous model
  • Better resistance to corrosion / abrasion due to sealed bonnet
  • Weighs less for easy handling
  • Space saver for difficult installations
  • Lower open and closing torques
  • Optional grades of diaphragms
  • Optional actuation: handwheel, pneumatic and electric (Visit the Biman product page for information on pneumatic actuators)
  • Optional accessories: proximity switches, solenoid valve and junction box
  • Optional types of positioners for modulating control
  • Body lining variations: Bare or unlined, soft and hard rubber butyl and neoprene, halar coatings, borosilicate glass, rilsan and FBE
  • A wide variety diaphragms available for different mediums
  • Body materials: Cast iron, ductile iron and stainless steel on request (CF8M S/S casting)
Guide to Body (Linings) Applications Range Availability
Body / Lining Typical Applications Size Temp °C
Cast Iron
Ductile Iron (SG)
Strength, low cost non corrosives DN15 - DN350 -20° to 175°
-Soft (SRL/AAL)
-Hard (Ebonite) (HRL)
-Butyl (BL)
- Neoprene (NL)
Economic handling opf corrosive & abrasive media
Abrasive duties
Acid, chlorinated water, moist chlorine
Mineral acids & slurries
Abrasive duties where hydrocarbons are present
DN15 - DN350 -10° to 85°
-10° to 85°
-10° to 110°
-10° to 105°
Borosilicate Glass Excellent for strong acids,halogens DN25 - DN350 -10° to 175°
Halar™ Excellent resistance to mineral and oxidising
acids inorganic bases, salts.
DN25 - DN350 -10° to 80°
Rilsan™ Potable water applications DN25 - DN350 -20° to 80°
Fusion Bonded Epoxy FBE Potable water applications DN25 - DN350 -20° to 80°
Guide to Diaphragm Application: Range Availability
A Abrasives in slurry or dry powder form DN15 to DN350 <-40° to 90°/td>
B Acid and alkalis. Up to 85% sulphuric acid at ambient temperatures. Hydrochloric hydrofluoric phosphoric acids, caustic alkalis and many esters. Sea water, very low vapour and gas permeability. Inert gases and many industrial gases DN15 to DN350 -30° to 90°
Q Abrasives, water purification brewing, inorganic salts, mineral acids DN15 to DN350 -30° to 90°
226 Paraffinic and aromatic hydrocarbons, acids, particularly concentrated sulphuric and chlorine applications. Not reccommended for ammonia and its derivatives or for polar solvents, e.g. acetone DN15 to DN250 -5° to 140°
237 Good acid and ozone resistance certain chlorine services DN15 to DN350 0° to 90°
300 For hot water services applications involving steam sterilisations, therefore, ideally suited for brewing and pharmaceutical applications. For services involving continuous high temperature / pressure combinations consult our technical department. DN15 - DN350 -20° to 120°
325 Salts in water, drinking water DN15 - DN350 -40° to 100°