Saunders Diaphragms
Saunders Rubber diaphragms are made from polymer materials which is bonded
with a high strength woven reinforcement to ensure maximum strengh and durability.
Some key features are:
Constructed with multi layers of rubber and nylon reinforcement
Rubber diaphragms have a brass stud.
Diaphragms are suitable for vacuum duty eg: CV have a steel stud which are attached with bonding adhesive and mechanical anchorage.
Diaphragms have a rib on face for weir flange and across weir for leak tight sealing and lower closure torque.
Compressor support in both the open and closed positions for extended life.
PTFE diaphragms have a two peice construction with PTFE face with rubber backing
diaphragm to increase pressure rating and durabilty .
These diaphragms have a stainless steel bayonet fitting to ensure reliable installation,
reduced poiont loading and ensure maximum life.
The 214K is a 3 peice diaphragm specially reinforced for chlorine service.
Saunders Diaphragms are provided with:
Coding tag fo both material and batch number for easy identifcation
Saunders name to confirm genuine manufacture and reliabilty
Full traceability of manufacture to EN10204 31.b (was DIN 50049 31.b)
available upon request.
A Type Diaphragms
Grade, Elastomer type and General service and approvals:
C: Butadiene Acrylonitrile,Sulphur cured ,Black reinforced
Lubricating oil, Cutting oils, Paraffin, Animal and Vegetable oils,Aviation kerosene
CV: Butadiene Acrylonitrile,Sulphur cured, Black reinforced
Vacuum where oils are present,compressed air, liquid petroleum gas (LPG)
HT:Polychloroprene, Sulphur cured, Black reinforced
Abrasive slurries containing hydrocarbons
Q:Natural rubber polyisoprene/SBR,Sulphur cured, Black reinforced Salts in water,dilute acids and alkalis, abrasives
226: Fluoroelastomer, Amine cured,Black reinforced
Concentrated acids, aromatic solvents, chlorine, ozone,chlorinated solvents, unleaded petroleum
237: Chlorosulphonated polyethylene,Metal oxide cured,Black reinforced Strong acids, sodium hypochlorite, chlorine gas
286: Chlorosulphonated polyethylene, Metal oxide cured, Black reinforced
kevlar fabric
Fire mains isolation in WFB valve
300: Isobutylene Isoprene, Resin cured, Black reinforced
Salts in water, dilute acids and alkalis, drinking water,Food and Drug
Administration (FDA), United States,Pharmacopeia (USP), Water
Regulations AdvisoryScheme (WRAS)
425: Ethylene propylene (EPM) Organic peroxide cured, Black reinforced Salts in water, acids and alkalis, ozone, intermittent steam,drinking water,
FDA, USP, WRAS
425V: Ethylene propylene (EPM) Organic peroxide cured, Black reinforced
Vacuum where acid, alkali, water vapours are present,FDA, USP, WRAS
214/226: Virgin PTFE/Fluoroelastomer –2 piece
Strong acids, solvents, chlorine, bromine at higher temperatures
214/300: Virgin PTFE/Isobutylene isoprene - 2 piece
Strong acids, alkalis and salts in water at high temperature.Constant steam,water for injection (WFI),biopharmaceuticals, FDA USP, WRAS
214/425:Virgin PTFE/Ethylene propylene -2 piece
Strong acids, alkalis and salts in water at high temperature
Constant steam, water for injection (WFI),biopharmaceuticals, FDA,USP,WRAS
214S/425:Virgin PTFE/PPVE/Ethylene propylene - 2piece
Strong acids, alkalis and salts in water at high temperature. Constant and intermittent steam, WFI, biopharmaceuticals, FDA, USP, WRAS
214K/425:Virgin PTFE/PVDF/Ethylene propylene -3 piece
Chlorine, bromine gas and chlorinated solvents
KB Type Diaphragms
Grade,Elastomer type and General service and Approvals:
AA: Natural rubber (polyisoprene) metal oxide pigmented brown sulphur cured, black reinforced.
Abrasives in slurry or dry powder form
C: Butadiene Acrylonitrile, (Nitrile) sulphur cured, black reinforced Lubricating oil, cutting oils,paraffin, animal and vegetable oils,aviation kerosene
HT: Polychloroprene, sulphur cured,black reinforced Abrasives slurries containing hydrocarbons
226: Fluoroelastomer, amine cured, black reinforced
Concentrated acids, aromatic solvents,chlorinated solvents,unleaded petroleum
300:Isobutylene Isoprene,resin cured black reinforced
Abrasive slurries, acid digested slurries,alkalis, dry powders
425: Ethylene propylene EPM) organic peroxide cured,black reinforced Abrasive slurries,acid digested slurries, alkalis, dry powders
Visual Process Resistance Guide and Temperature Charts
