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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,041 companies indexed · Last updated: today
DirectoryReal EstateProperty ManagementSerneusAMSAG AG
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AMSAG AG

Summary

About the company

AMSAG AG manufactures valves and shut-off equipment for hydropower plants and dams, including shut-off and butterfly valves, spherical valves, hollow-jet valves, pressure relief valves and related accessories. The company also designs hydraulic and control systems and provides planning, inspection, repair and modernization services for hydro installations.

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10
Valves for hydropower plants
Valves and shut-off components for hydropower plants, from pipe burst and turbine protection to environmentally sound water discharge; partly manufactured specifically to customer requirements.
Service, installation and commissioning
Service and installation services for hydropower plants, including project preparation, manufacture, factory acceptance tests, transport, installation, commissioning and handover to the operator.
Overhauls, maintenance and modifications
Overhauls, repairs, refurbishment and modifications of valves, on site or in the workshop, including inspection, corrosion protection, coating/painting as well as reassembly and commissioning.
Advisory and documentation
Advisory for complex hydropower projects as well as preparation of drawings, documents, instructions and records according to quality management and customer requirements.
Shut-off and throttling valves
Shut-off and throttling valves for hydropower, designed for increased safety and reliability in critical applications.
Ball valves
Ball valves as safety and shut-off components for turbines and pumps in hydropower plants.
Cone-jet sluice gates
Cone-jet sluice gates for environmentally friendly water discharge in hydropower plants.
Pressure limiting valve
Pressure limiting valves to prevent machine overspeed and excessive pressure increases.
Accessories
Accessories for valves in hydropower plants, flexibly adaptable to varying requirements of the installations.
Control and instrumentation
Hydraulic power units and controls for operating the plant, including fabrication and installation.
Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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Location

Badstrasse 11
7249 Serneus
Opening hours
Mon
08:00 - 12:00, 13:00 - 16:00
Tue
08:00 - 12:00, 13:00 - 16:00
Wed
08:00 - 12:00, 13:00 - 16:00
Thu
08:00 - 12:00, 13:00 - 16:00
Fri
08:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-100.464.239
Founded
2000 · 26 years
Last commercial register change
April 8, 2026
Employees
11 to 20

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