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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryReal EstateProperty ManagementSerneusAMSAG AG
AMSAG AG Logo
Verified· 3 sourcesTrust Score
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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Products & services

Industry:Property Management
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AMSAG AG

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.
Trust & reputation

ranQ Trust Score of AMSAG AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

AMSAG AG scores 69.4 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.75.024%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.40.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.88.08%
AMSAG AG scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
AMSAG AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
AMSAG AG scores 100.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

AMSAG AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 4 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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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
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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