When water flows out of the taps in Austria’s second largest city, then on the 76.5 km long journey through the drinking water pipeline from the Hochschwab region, it has passed a series of pipe rupture valves (butterfly valves) from our manufacturer Erhard. But not only Graz, also other municipalities rely on our valves, which are suitable for drinking water and certified for water production and treatment, water distribution and industrial water supply.
For 100% tightness even under the greatest dynamic loads, we prefer to use products such as gate valves and butterfly valves in the drinking water sector instead of knife gate valves. Corrosion protection and clean water are guaranteed due to epoxy resin and enamel coatings as well as a special design.
Flowtec valves are also used in other areas where water is used as a medium, such as in hydropower plants, in desalination plants, in the waste water industry in municipal and industrial areas, in the fresh water supply and in municipal sewage treatment plants.
Those who rely on exceptional longevity and reliability throughout the entire water cycle rely on the comprehensive solutions from Erhard.
Clean work
in the waste water industry
Especially in the waste water sector, in sewage treatment plants and other processes with contaminated and chemically aggressive media, it is important, even more than in other areas, that absolute tightness is guaranteed at critical points such as on lines in maintenance walkways, shafts or at transitions between different process steps.
A long service life as well as the reliable opening and closing of the shut-off butterfly valve even after it has not been used for a longer period of time are requirements of our customers. Simple and fast maintenance or repairs are also an important criterion.
Just a few clicks to your desired standard product.
Our product finder will help you find the valve you need.Not found the right one? Our diversity goes much further and our sales representatives will provide comprehensive consulting on individual solutions.
Sometimes you have to
let off pressure.
Big hydro solutions.
While most water applications operate at low pressure ranges, the big hydro sector is characterised by extremely high pressure ranges and overpressures. The reduction of excess energy is an industry-specific challenge.
That is why we pay particular attention to an optimum choice of valves. For example, fixed cone valves must meet very special requirements with respect to energy reduction as part of the controlled discharge of the reservoir. The energy is converted by means of umbrella-like atomisation, cavitation and vibration problems are avoided and therefore buildings are protected.
Salt applications need increased corrosion protection

DIN safety relief valve

DIN safety relief valve high pressure

Nozzle check valve streamLiner

Ball check valve

Metal seated DIN gate valve

4-offset-eccentric metal seated high performance Quadax butterfly valve

Uni-directional high performance knife gate valve

Uni-directional knife gate valve

Bi-directional knife gate valve

DIN on/off and control globe valve, "stellite" version

Metal seated, DIN flanged ball valve, long/short pattern, floating

DIN flanged ball valve, short pattern, floating

DIN/ANSI forged trunnion design, soft/metal seated, flanged ball vale

3-piece ball valves

Control valve

Non slam nozzle check valve

Double eccentric butterfly valve

Wafer type swing check valve

Wafer / lug type butterfly valve
Needle valve
ANSI cast trunnion design, flanged ball valve, soft/metal seated
Soft seated, ANSI flanged ball valve, floating
Digital (electro-pneumatic) positioner
Digital (electro-pneumatic) positioner EDP300
ANSI metal seated flanged ball valve, floating

Double eccentric, high performance butterfly valve Colossus
Check valve
Pneumatic rack-and-pinion actuator
Pneumatic scotch yoke actuator
3-way ball valve, soft seated, compact design
Compact ball valve, soft seated
Electric multi-turn and part-turn actuators
3-way control valve
Flanged globe style control valve
Standard angle control valve
High pressure control valve
Butterfly valve Hydromat®
ANSI safet relief valve
DIN und ANSI Sicherheitsventil für den Niederdruckbereich
DIN safety relief valve, low pressure, threated
Barstock control valve
Standard control valve
Plastic butterfly valve
Plastic ball valve
Plastic diaphragm valve
CeraValve ceramic lined ball valve
CeraValve partially ceramic lined ball valve
CeraValve ceramic lined sliding disc valve
Dual plate check valve
Analog positioner
Digital positioner
Fail safe electric actuator
Compact electric actuator with integrated control unit
Metal seated DIN swing check valves
Pinch valve aiRFlex®
Slurry bi-directional knife gate valve with rubber sleeves
Uni-directional knife gate valve
Bi-directional knife gate valve, stainless steel
DIN strainer
DIN piston check valve
DIN on/off and control globe valve
Square port knife gate valve for solid loaded fluids
Round swing flap gate penstock
Rectangular swing flap gate penstock
Metal-to-metal seat wafer style tilting disc check valve
Channel penstock
Fixed cone valve
Wall mounted penstock
Valve for hydraulic works, bonneted gate
LDM Valves, 2- und 3-Wege Regelventile
Soft seated, butterfly valve
Metal seated, 3-piece ball valve
Metal seated, forged monobloc ball valve
Soft seated, forged monobloc ball valve
Metal seated, DIN flanged ball valve, long pattern, floating
Soft seated, DIN flanged ball valve, long pattern, floating
Soft seated DIN flanged ball valve, long pattern, floating
DIN flanged ball valve, semi trunnion, long/short pattern series
DIN flanged ball valve with heating jacket, long pattern, floating
Soft seated 3-piece flanged ball valve, floating
ANSI piston check valves
Soft seated, ANSI flanged ball valve, floating, full bore
Soft seated, ANSI flanged ball valve, floating
ANSI flanged ball valve, semi trunnion
ANSI double block and bleed ball valve, floating
Soft seated 3-piece flanged ball valve, ANSI, floating
Limit switch box
Soft seated 3-piece ball valve
Electric part-turn actuator
Limit switch box
Limit switch box
Diaphragm valve
