WTM Valves & Services is the exclusive OEM source for both safety-related and non-safety related Hammel Dahl control valve products for the nuclear power industry, excluding Canada. We provide both sales and product support for the installed Hammel Dahl product lines, as well as for the current lines under the Koso Hammel Dahl brand. We have contracted with the Anderson-Greenwood Crosby operation of Pentair Valves and Controls (formerly Tyco Valves & Controls, LP) for the manufacture and supply of safety-related Hammel Dahl items.
Products we market and support include
- Original Hammel Dahl Control Valves and Actuators
- Hammel Dahl BWR Control Rod Drive Scram Valves
- Hammel Dahl Nuclear Sampling Valves
- Spare Parts for Original Hammel Dahl Control Valves and Actuators
- Spare Parts for Hammel Dahl BWR Control Rod Drive Scram Valves
- New Koso Hammel Dahl Control Valves and Actuators
- Replacement Valves for Obsolete/Unsupported Equipment
- Specialty and Custom Valves for Nuclear Service
- Pneumatic Diaphragm Actuators
- Electro-Hydraulic Actuators
- Valve/Actuator Retrofits, Upgrades, and Modifications
- Valve Accessories
- Custom Engineered Valves
Original Hammel Dahl Product Lines Supported by WTM Valves & Services:
- 500 or V500 Series Globe Valves
- 600 or V600 Series Ball Valves (soft-goods only)
- 800 or V800 Series Globe Valves
- V999 Series BWR Scram Valves
- V999 Series Nuclear Sampling Valves
- 20/A20 Series Daiphragm Actuators
- 40/A40 Series Diaphragm Actuators
- 41 or A41 Series Diaphragm Actuators
- A32 Series Piston Actuators
- Others (contact us!)
New Koso Hammel Dahl Product Lines offered by WTM Valves & Services:
- G110 Series Globe Control Valves
- G120 Series Globe Control Valves
- G130 Series Globe Control Valves
- V510/V520 Series Globe Control Valves
- V817-1 Series Cryogenic Globe Control Valves
- D/R Series Diaphragm Aactuators
- Electo-Hydraulic Actuators
Please Note: Hammel Dahl Globe Valves may have been sold under the following brands:
- Hammel Dahl Company
- ITT General Controls/Hammel Dahl
- ITT Grinnell/Hammel Dahl
- ITT Grinnell/Hammel Dahl – Conoflow
- Hammel Dahl, Inc.
- Hammel Dahl and Jamesbury (HD&J)
- Neles Jamesbury
- Neles Automation
- Metso Automation
Koso America/Hammel Dahl (Current)
Frequently Asked Questions
What types of nuclear control valve products does WTM supply?
WTM supplies original Hammel Dahl and current Koso Hammel Dahl control valves, actuators, OEM replacement parts, CRD scram valve components, nuclear sampling valves, replacement valves, custom-engineered valves, accessories, and related equipment for nuclear power applications. Through their partnering arrangements, WTM can also supply severe service control valves and/or trim modifications for non-safety related severe service applications under the Parcol product line.
Does WTM provide both safety-related and non-safety-related Hammel Dahl products?
Yes. WTM supports both safety-related and non-safety-related Hammel Dahl control valve products for the nuclear power industry, subject to the requirements and specifications of the particular equipment and application. WTM handles product support and all sales activities for safety-related products, with order processing and shipment under the quality system of our partnering organization.
Which original Hammel Dahl product lines does WTM support?
Supported product families include V500 Series globe valves, V510 series globe valves, V600 Series ball valves for applicable soft goods, V800 Series globe valves, V999 Series BWR scram and sampling valves, A20, A40 and A41 diaphragm actuators, A32 piston actuators, current G110/G120, G130 control valves, current D/R series actuators as well as additional Hammel Dahl/Koso Hammel Dahl equipment.
Which current control valve lines are available?
Current product offerings include Koso Hammel Dahl G110, G120 and G130 Series control valves, V510/V520 Series globe control valves, V817 cryogenic globe valves, D/R Series diaphragm actuators, electro-hydraulic actuators, and other configurations suited to specific applications. In addition, WTM can supply control valves for severe service under the Parcol product line.
Can WTM provide replacement valves for obsolete equipment?
Yes. WTM can assist with replacement valves for obsolete or unsupported equipment and can evaluate retrofit, upgrade, modification, or custom-engineered options when a direct replacement is not appropriate.
Are OEM spare parts available for installed Hammel Dahl valves and actuators?
Yes. WTM supplies OEM spare parts for numerous original Hammel Dahl valve and actuator designs, including diaphragms, cages, stems, seats, plugs, seals, gaskets, scram valve components, and other replacement items.
How can I determine which Hammel Dahl product I have?
Provide WTM with available information such as the valve or actuator model number, tag number, nameplate data, drawing number, application, and photographs. The technical team can use this information to help identify the equipment and determine appropriate