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ST Resilient Seated
ST Cartridge and Boot Style Butterfly Valves
                           STANDARD FEATURES: 

DUCTILE IRON, EPOXY COATED, 1 PC BODY

Available in sizes 2"-24", tapped lug body, or wafer design with locating holes. Both designs are for use with ANSI 125/150 lb flanges. Basic design complies with API 609, ISO 5752, and MSS-SP67. (CRN Registred Across Canada)

ISO 5211 DIRECT MOUNTING PAD

Universally recognized standard for adaptation to pneumatic and electric actuators, mechanical position transmitters, and gear operators.

CARTRIDGE SEAT

The completely encapsulated phenolic backed elastomer offers advanced performance while maintaining low torque. The seat incorporates primary seals that mate with the hub portion of the disc. The upper and lower shaft journals incorporate a moulded double O-ring secondary seal. This design allows for diverse seat materials like Fluoroelastomer (Viton), PTFE (teflon), silicone and more.

BOOT SEAT

Boot seat deasign allows for a butterfly valve which is repairable, also has a larger seating area for easier installation.

SEAT MATERIALS

EPDM
BUNA-N(NBR)
WHITE EPDM
VITON
HIGH TEMPERATURE EPDM
TEFLON

SQUARE STEM

The square stem features all the benefits of a high strength two piece design without the disadvantages associated with other designs that use taper pins or disc screws which often fail prematurely through abrasion, corrosion, or fatigue.

316SS DISC

The standard pinless stainless steel disc provides exceptional durability and corrosion resistance. All Stonetown disc castings are spherically machined and polished for extended seat life and zero leakage/bubble tight shut off.

SECURE STEM RETAINER PLATE

The fastened down stem retainer plate provides blowout-proof protection. MOULDED O-RING The resilient seat with moulded o-ring eliminates the need for flange gaskets.

TEFLON STEM BUSHINGS

Teflon stem bushings reduce operating torque as well as provide maximum shaft support and alignment while isolating the stem from the valve body, preventing corrosion in the stem journal and stem seizure.

TESTING

Stonetown Butterfly Valves are tested to API 598 and BS5155. All valves are subjected to a body pressure test of 150% and shell 110% of maximum working pressure.

QUALITY

is designed into every Howell Butterfly Valve. The Resilient Seated Series features precision machined parts and uses a phenolic backed cartridge seat to ensure years of dependable operation.  

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 Contact info: Sales@howellvalve.com
Phone:                    1 888 469-3557 
Fax:                        1 866 469-3550