4 Valve Description
20 of 94
0570.82/17-EN
4.3.4 NORI 160 ZXLF/ZXSF
Fig.7: NORI 160 ZXLF/ZXSF
4.3.4.1 General description
▪ Globe valve with gland packing
Valve for shutting off fluids in industrial plants, power stations, process engineering
and shipbuilding.
4.3.4.2 Design details
Design
Valves to type series booklet 7633.1
▪ Straight-way pattern
▪ On/off disc DN10-100
▪ Balanced plug ≥DN125
▪ Non-rotating stem
▪ Position indicator
▪ Seat/disc interface made of wear and corrosion-resistant chrome steel (Cr) or
stellite
▪ Stem sealed by gland packing
▪ Fully confined bonnet gasket
▪ Corrosion-protected bolts/screws and nuts
▪ Yoke head suitable for mounting electric and pneumatic actuators (DINISO5210)
▪ Type-tested to TRD110, TRB801 No.45TÜ.A.237 (DN 10-50)
Variants
▪ Throttling plug ≥DN65
▪ Single-piece stem and throttling plug assembly
▪ Balanced plug ≥ DN65
▪ Stellited seat/disc interface (standard for 1.7335/1.7357)
▪ Oil and grease free (wetted parts)
▪ Limit switch(es)
▪ Threaded bush free from non-ferrous metals (DN 65 and above)
▪ Actuator installation kit
▪ Hard-faced back seat from DN 65
▪ Connection branches made of 16Mo3 (≥ DN65)
▪ Other flange designs
▪ Other butt weld end versions
▪ Other socket weld end versions
▪ Inspections to technical codes such as TRD/TRB/AD2000 – German Steam Boiler /
Pressure Vessel Regulations – or to customer specification
4.3.4.3 Function
Design The globe valve comprises the pressure-retaining parts, i. e. body 100 and yoke 166,
the functional unit (stem 200 and valve disc 350/352) and the actuating element.
Sealing Body 100 and yoke 166 are joined by studs 902 and nuts 920.1, and the joint is sealed
to atmosphere by joint ring 411.
The passage of stem 200 in yoke 166 is sealed by gland packing 461, which is
tightened via gland follower 452 by means of two nuts 920.2.
The seating faces of body 100 and/or valve disc 350 are made of stainless materials.
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