Hose diaphragm valves DN 15 - DN 200 by Duerholdt that Audco Italiana markets exclusively have a free and flowing duct for the fluid that passes through it, the flow is in contact with the flexible and elastic insert which has the great advantage of being interchangeable and easily replaceable in case of wear, thus allowing the Diaphragm valve to last a long time.
These soft-seal valves for pressures up to PN 6 depending on the nominal diameter are also used for aggressive media containing solids, abrasives, powders and neutrals.
The positively guided hose insert ensures perfect opening and closing of the valve.
In addition to the manually operated version, the diaphragm valves
they are available with electric and pneumatic position and control actuators with various control components, also as safety and float valves.
The best valves choice for your company contact us for quick contact.
Range of application:
acids, alkaline solutions, aggressive liquids, sludges,waste water, sand-water mixtures, ore-sludge and coal-silt, abrasive media, powdery products (like e.g. cement, lime, gypsum etc.), mineral oil, water, air, neutral media, liquids containing solids, crystallizing media, highly viscous media, syrup, juices, mash.
Construction:
free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, body with polyester powder coating
Materials:
see table below, other materials on demand
Operating pressure:
DN 15 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 200 max. 3 bar
Operation: with handwheel
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
DN 200 = DIN 2501, PN 10
DIN 2532 / EN 1092-2, PN 10
Special constructions:
rubber lining in quality NR food or heat resistant
rubber lining in quality Perbunan NBR or Neoprene CR
rubber lining in quality Butyl llR, Hypalon CSM or EPDM
rubber lining in quality NR with PTFE-foil
rubber lining with steel spiral for light vacuum
stem in brass or stainless steel, stem extension, stem fixing nut and stroke limitation, limit switches, with position indicator, with chain wheel,in bigger sizes, for higher pressure stages, with pneumatic and electric actuator, hose diaphragm float valves, hose diaphragm safety valves.
Range of application:
acids, alkaline solutions, aggressive liquids, sludges, waste water, sand-water mixtures, ore-sludge and coal-silt, abrasive media, powdery products (like e.g. cement, lime, gypsum etc.), mineral oil, water, air, neutral media, liquids containing solids, crystallizing media, highly viscous media, syrup, juices, mash.
Construction:
free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, body with polyester powder coating.
Materials:
see table below, other materials on demand
Operating pressure:
DN 20 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 150 max. 3 bar
Operation:
with handwheel
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
Special constructions:
rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan NBR or Neoprene CR, rubber lining in quality Butyl llR, Hypalon CSM or EPDM, rubber lining in quality NR with PTFE-foil, rubber lining with steel spiral for light vacuum, stem in brass or stainless steel, stem extension, stem fixing nut and stroke limitation, limit switches, with position indicator, with chain wheel, in bigger sizes, for higher pressure stages, with pneumatic and electric actuators.
Range of application:
acids, alkaline solutions, aggressive liquids, sludges, waste water, sand-water mixtures, ore-sludge and coal-silt, abrasive media, powdery products (like e.g. cement, lime, gypsum etc.), mineral oil, water, air, neutral media, liquids containing solids, crystallizing media, highly viscous media, syrup, juices, mash.
Construction:
with mounting flange ISO 5210 F 10 or F 14
with non-turning stem
free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, body with polyester powder coating.
Materials:
see table below, other materials on demand
Operating pressure:
DN 15 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 200 max. 3 bar
Operation:
with pneumatic or electric shut/off and control actuators
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
DN 200 = DIN 2501, PN 10
DIN 2532 / EN 1092-2, PN 10
Special constructions:
in bigger sizes and for higher pressure stages, rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan NBR, Neoprene CR, Butyl llR, Hypalon CSM or EPDM.
Range of application:
Acids, alkaline solutions, aggressive liquids, sludges, waste water, sand-water mixtures, ore-sludge and coal-silt, abrasive media, powdery products (like e.g. cement, lime, gypsum etc.), mineral oil, water, air, neutral media, liquids containing solids, crystallizing media, highly viscous media, syrup, juices, mash.
Construction:
with mounting connection and holding thread, with turning stem, free and smooth opening passage, without stuffing box, with interchangeable rubber lining,
with controlled operation, body with polyester powder coating.
Materials:
see table below, other materials on demand
Operating pressure:
DN 15 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 200 max. 3 bar
Operation:
with pneumatic actuators
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
DN 200 = DIN 2501 PN 10, DIN 2532 / EN 1092-2, PN 10
Special constructions:
in bigger sizes and for for higher pressure stages, rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan NBR or Neoprene CR, rubber lining in quality Butyl llR, Hypalon CSM, or EPDM.
Range of application:
acids, alkaline solutions, aggressive liquids, sludges, waste water, sand-water mixtures, ore-sludge and coal-silt, abrasive media, powdery products (like e.g. cement, lime, gypsum etc.), mineral oil, water, air, neutral media, liquids containing solids, crystallizing media, highly viscous media, syrup, juices, mash.
Construction:
with mounting flange ISO 5210 F 10 or F14, with turning stem, with lantern piece, free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, body with polyester powder coating.
Materials:
see table below, other materials on demand
Operating pressure:
DN 15 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 200 max. 3 bar
Operation:
with pneumatic piston actuator
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
DN 200 = DIN 2501, PN 10, DIN 2532 / EN 1092-2, PN 10
Special constructions:
in bigger sizes and for higher pressure stages, rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan NBR, Neoprene CR, Butyl llR, Hypalon CSM or EPDM.
Range of application:
acids, alkaline solutions, aggressive liquids, water, waste-water, sludges, liquid containing solids, crystallizing media, highly viscous media
Construction:
free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, closing when the float rises, without float and float rod, can be delivered on demand against additional charge.
Materials:
see table below
Operating pressure:
DN 20 - 80 max. 6 bar
please indicate when ordering
Operation: with pneumatic or electric shut/off and control actuators
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
Special constructions:
rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan, Neoprene, Butyl, Hypalon and EPDM.
Cylindrical float in V2A, V4A, Cu and steel rubberized, Float rod in V4A and steel rubberized.
Range of application:
acids, alkaline solutions, aggressive liquids, water, waste water, sludges, liquids containing solids, crystallizing and highly viscous media etc., in by-pass lines as relief valve usable.
Construction:
open coverage type, free and smooth opening passage, without stuffing box, with interchangeable rubber lining, with controlled operation, with mounted spring, with pressure screw.
Materials:
see table
Operating pressure:
DN 15 - 80 max. 6 bar
DN 100 max. 5 bar
DN 125 - 150 max. 3 bar
Flange connection:
DIN 2501, PN 16
DIN 2533 / EN 1092-2, PN 16
Special constructions:
rubber lining in quality NR food or heat resistant, rubber lining in quality Perbunan NBR or Neoprene CR, rubber lining in quality Butyl llR, Hypalon CSM or EPDM.
Rubberlinings / hose inserts part 3 for Hose Diaphragm Valves:
- with handwheel – type sheet 100.101
- with pneumatic actuators – type sheets 1200.1201 and 1200.1202
- with electric actuators – type sheets 1200.1203, 1200.1204 a. 1200.1205
- for hose pinch float valves – type sheet 500.501
- for hose pinch float safety valves – type sheet 800.801
Available in varying materials and qualities, temperature data refer to water:
- natural rubber NR 5153 black (max. + 80° C)
- standard (also abrasion resistant)
– natural rubber NR 526black3 (max. + 90° C)
- natural rubber foodstuff resistant NR 5055 bright
– also according to FDA (max. + 70° C)
- perbunan NBR 5960 (max. + 70° C)
- Neoprene CR 4860 (max. + 70° C)
- EPDM 5562 (max. + 90° C)
- Hypalon CSM 5664 (max. + 70° C)
- Butyl IIR 5560 (max. + 70° C)
- natural rubber with PTFE-foil (max. + 90° C)
The resistance of the materials above is depending on the concentration and temperature as well as on the operation pressure of the process media. Threaded parts vulcanized into rubberlinings building the bolt connections to the control spindle of the armature on one side and on the other to the valve body.
With it a controlled operation is made so that the rubber linings - also with sticky media and media tending to incrustation - always open faultlessly. By the squeezing operation unwanted deposits will be detached and flowing off.
These high class lining and mould parts are produced in steel moulds due to decades of experience. Fabric linings in polyamide fabric are integrated onesided on the upper side to reinforce the rubber lining and are vulcanized.
The close cooperation with our rubber laboratory and available resistiveness lists aim to determine the most resistive rubber composite and quality for specific needs and cases of operation.
The rubber lining is only in contact with the process medium.