Series 8850/1
Sizes Series 8850: Forged 1/2” ~ 2” ( DN15 ~ DN50 )
Body Material: C. Steel A350 LF2, S. Steel F316.
Sizes Series 8851:Cast 2 1//2” ~ 16” ( DN65 ~ DN400 )
Body Material: A352 LCC C. Steel, A351 CF8M St. Steel, A494 M35-1 NiCu,
CW12MW NiCrMoW, CY40 NiCrFe.
End connections - 1/2” ~ 1 1/2” (DN15 ~ DN40) Screwed End, Socket Weld.
1/2” ~ 16” (DN15 to DN400) flanged Class 150, Class 300, PN16, PN25 and PN40.
 
Features & Benefits
Containment of Dangerous Emissions
All valves are fitted with a UNS N10276 bellows seal guaranteed for 20,000 Open/Close/Open cycles. Valves are also designed with back up secondary pure PTFE packing glands and seals as standard.
Repeatable tight closure and isolation.
The seat and disc are stellite coated to ensure a hard wearing and positive shut-off. for metal to metal seated valves the disc is harder than the seat minimising disc damage during operation ensuring long life for the seating surfaces. Polymer ring soft seat plugs are also available.
Open Bellows Design
Our design of open bellows and bolted top assembly gives easy access to inspect the bellows assembly area. The open design ensures that any corrosion products in the fluid do not get trapped around the bellows causing damage and early failure.
Body Integrity and wall thickness
Small valve bodies and all sizes of bonnets are forgings. Cast body integrity is monitored by 100% x-ray inspection, while wall thickness is in accordance with Euro Chlor specifications for use on liquid chlorine services. Hunt & Mitton Valve Company is the only manufacturer of Euro Chlor approved valves to offer 100% radiography of all castings for chlorine service.
Actuators
Pneumatic or electric actuators are available. The valves can be fitted with air regulator sets, Solenoid valves for open or emergency shutdown and or, air lock valves for fail in place.
Xylan® coated
All studs and nuts are coated with Whitford Xylan® anti corrosion, self lubricating compound.
Bellows seals
Bellows seals are made from UNS N10276 with UNS N10276 end rings. They are welded to the bonnet and stem and the welds are subject to 100% DPI and an external test at 57 barg for a minimum of 10 minutes to confirm zero leakage.
Design & Performance
With a strength in design and excellent materials for the containment and isolation of hazardous liquids and gases, the Fig 8850/1 range has built an enviable reputation for long service life and excellent performance.