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Harsh Steel manifolds have excellent flow regulation and leak tightness. The operation is smooth, easy, low-torque & long life. Internal surfaces & threads are 100% free from burrs & other foreign particles. Many of the options available with needle valves are available in manifold form. Complete Bonnet assembly will be similar to needle valves. Manifold valves have stainless steel color coded identity tags affixed to the individual head units, Red for Isolate, Green for Equalize and Yellow for Vent. Manifolds have plugs as standard on gauge valves only, for all others this is optional. End connections are ½" NPT(F) & pressure rating is 6000 PSI as standard.
All direct mount manifolds are supplied with Teflon gaskets and high tensile carbon steel bolts. Grafoil gaskets and stainless steel bolts are available as optional.
All valves can be made available to conform to NACE MR-01-75 (latest revision) for sour service. Multiple mounting hole options are available on request. Universal mounting bracket fits most manifolds, plus other options are available.
Design |
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Suitable for mounting on Rosemount, Yokogawa, Honeywell, ABB & other reputed Transmitters |
Spindle Tip |
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Non–Rotating Tip: “Vee” Type & Ball Type (Tunsgten Carbide)
Rotating Tip : “Vee” type only. |
Seat |
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Metal to Metal, Stellited, Teflon |
Packing & “O” Rings |
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Standard-PTFE. Optional GRAPHOIL, PEEK, CFT etc. |
Patterns |
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“R” Type, “T” Type, “H” Type in standard & Co-Planar design. |
Pressure Rating |
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PTFE – 6,000 PSI. GRAPHITE – 4,500 Psi. |
End Connections |
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NPT/Flanged/BSPT/BSPP as standard. Butt Weld, Socket Weld, Compression Fittings as per your requirements. |
Handle & Bolts |
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SS 304 |
M.O.C |
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Body-ASTM A182 F 316(L), 304(L) etc. All other spares in ASTM A 479/A276 Gr. 316(L), 304(L).
Other M. O. C’s: Titanium, Monel, Hastelloy C. etc.
Products can be supplied to conform to NACE MR 0175. |
Temperature |
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PTFE: Max. up to 250 Deg. C
GRAPHITE: Max. up to 648 Deg. C. |
Orifice Dia. |
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4.8 mm as standard. Others as per request. |
Lubrication / Sealant |
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Anti-Seize: NEVER-SEEZ
Thread Sealant: LOCTITE 542 |
Testing |
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Standard : Hydro Test, Pneumatic Test, Nitrogen Test
Optional : Vibration, Temperature Cycling, Helium etc. |
SPECIAL/OPTIONAL KEY FEATURES:
Harsh Steel offers Valves with Non-Rotating Tip Stem (NRT) thereby providing tight, repeatable shutoff without the galling or cross-scoring that occurs on V & ball-type stems. The NRT stops rotating when it contacts the seat so that any further torque turns the stem and not the tip. Furthermore, the conical stem tip seats in the same place every time - the more often the valve is seated, the better the mating with the seat is achieved. By contrast, the single piece Rotating Type ‘Vee’ tip does not seat in the same place every time, as the tip has no consistent axis of rotation. Consequently, every time the valve seats, a new seat mark is scored on the tip, creating multiple potential leak paths.
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