Adanac was formed in 1986 to offer modification services to the valve
supply industry with quality manufacture and reliable delivery being the key to our continued growth. Over nearly 25 years the range
of modifications offered has continued to increase to include:
Fugitive Emissions Bonnet Extensions
Reducing plant emissions for safety and environmental reasons is important to most valve users.
Adanac carry out the modification of Ball, Gate and Globe Valves to provide extra depth stem gland seal
incorporating double gland, lantern ring and vent tapping. This provides increased integrity sealing reducing leakage to atmosphere,
with the facility for early leak detection on processes where reducing emissions is important.
In addition, the ATaCS facility offers the ability to carry out prototype and production testing of the
modified valve, providing the user with the added confidence of a performance test certificate.
Valve Trim Changes Adanac have the ability to take a standard, off the shelf valve and make changes to the trim components
to suit the user’s specific requirements.
Typical trim changes include replacement of stem, disc and seat components in an alternative material. Also overlay of seating components
to provide improved wear and process resistance.
Materials include Duplex and Super Duplex Stainless Steels, Chrome and Nickel based alloys, Copper based alloys and Hard Facing materials
such as Stellite 6 and 22.
Ball Valve trim changes include replacement of Ball and Stem components in alternative materials.
Adanac also offer Surface Coating of valve components such as Electroless Nickel Plating, Wear Resistant
Materials and Passivating.
Soft Seat Conversion Adanac modify metal seated gate, globe and check valves to soft seated by the fitting of inserts into
the wedge, disc or seat. Insert materials such PTFE, PCTFE, PEEK, EPDM and Viton are held in stock allowing the modification of standard
valves on short lead-times.
Ball Valve Seat Changes Adanac hold stocks of semi-finished rod and tube in a number of materials including Virgin and Filled
PTFEs, PEEK, PCTFE, Devlon, Nylon, UHMWPE for the manufacture of ball valve seats in non-standard materials. Adanac
has experience in redesigning seats to suit particular applications.
Gland Packing and Gasket Changes Adanac hold stocks of gasket materials in finished and semi-finished form allowing us to respond quickly
to requests to change the gasket on valves from the standard material. Cut sheet and spiral wound bonnet gaskets can be produced and
fitted in a matter of days.
We also hold stocks of the common manufacturer’s stem packing materials such as James Walker, Latty, Garlock and Beldham. Our
stem packing fitters are approved by Garlock GB.
Outside Lever & Weight
Adanac provide assisted closure mechanisms fitted to swing check valves. Extending the valve spindle through a gland arrangement allows
for a number of applications where greater control of the operation of a swing disc type non-return valve is required. Such as the
a weight to assist closure.
a damper to control the speed of closure.
a locking device to hold the valve open (or closed) when required.
a fusible link to provide closure in case of fire.
limit switches or proximity sensors for remote monitoring of the valve’s position.
End Connection Conversion Adanac are able to carry out modification of valve end connection to suit the user’s particular
Changes to flange form such as converting from Raised Face to Ring Joint or Tongue and groove or vice versa.
Conversion from Female Screwed to Socket Weld End.
Conversion of Butt Weld End valves from one schedule/wall thickness to another.
The addition of standard or special flanges to weld end valves to produce non- standard face to face dimensions or flange forms.
Conversion of weld end valves to Dairy or Sanitary End connections such as Tri- Clamp, IDF and RJT
The attachment of pipe stubs to weld end valves.
Screw-Down Non-Return Conversion
Modification of the stem and disc converts a standard globe valve into a Screw-down Non-return valve sometimes also known as a Stop
and Check Valve.
The globe action allows flow to be shut-off when in the fully closed position and also to regulate flow through the valve while open.
Locking Devices Adanac can provide the solution to unauthorized or accidental valve operation.
From simple chain and padlock type locking devices to bespoke locking devices designed and fabricated in our workshop facility.
We also offer a fitting service, on-site or at our facility.
Locking devices can be supplied with ‘like-keyed’ or standard multiple keyed locks to meet the user’s particular
Simple two position devices to lock the open and close positions. Adanac also design devices allowing
the valve to be locked in multiple intermediate positions.
Adanac’s tagging services can provide suitable valve/key identification.
Adanac design, fabricate and fit valve interlock solutions. Particularly useful where the operating
sequence of process equipment is critical, Adanac can provide key logic with single or multiple keys on
retain/release functions to control the operation of valves and other process equipment.
Position Indicators Adanac provide Quarter-turn and Multi-turn valve position indication devices, designed and fabricated
at our workshop facility.
Simple two position indication to show if the valve is open or closed. Multiple graduated indicators, particularly useful on multi-turn
valves in providing a reference of a valve’s position in relation to process flow conditions.