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Through Conduit Pipeline Valves

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Through Conduit Pipeline Valves

Extra Information

The HH standard range includes 150, 300 & 600 pressure classes in sizes 2" to 36" and is manufactured in accordance with API6D.

Description

Description

The HH standard range includes 150, 300 & 600 pressure classes in sizes 2" to 36" and is manufactured in accordance with API6D. The valves are ideal for use in pipeline transmission applications by providing a genuine full bore capability to keep line pressure losses to a minimum. The valves are also capable of accepting all types of line cleaning devices such as pigs and scrapers.

The design offers bubble-tight shut-off, capable of achieving double block and bleed conditions and low operating torques.

The standard valve is of cast carbon steel construction with the body/bonnet material in accordance with ASTM A216 Gr. WCB. The seat rings, which are fitted with a PTFE (Teflon) primary seal insert, are allowed to float in the body housing. The disc plate is hard chrome faced to resist wear and to protect the sealing faces, remains in contact with the seat during full operation of the valve. The stem is totally enclosed to offer protection from the surrounding environment, particularly useful in desert locations where sandstorms are frequent. End connections are normally supplied in accordance with ASME B16.5 but other end connection standards can also be accommodated including butt-weld.


Specification Details


    API 6D compliant
    Flanged or butt-weld ends
    Resilient soft seats for positive shut-off (200°C max)
    Bubble tight shut-off meeting BS EN ISO 12266-1 and API598
    Low emission graphite gland packing
    Castings to ASTM E446 level 3
    Available in a wide range of materials and trim options
    Available in pressure classes 150 - 600

Optional Features


    Option for actuator (pneumatic, electric)
    Drain connections
    Bevel gear operation where non-standard
    Indicator and locking devices
    Extension shafts for remote operation