Design |
: |
Screwed Bonnet / Integral (Union) Bonnet. |
Spindle |
: |
Non–Rotating Tip: “Vee” Type & Ball Type (Tungsten Carbide)
Rotating Tip : “Vee” type only. |
Seat |
: |
Metal to Metal, Stellited, Teflon |
Packing |
: |
Standard-PTFE. Optional GRAPHOIL, PEEK, CFT etc. |
Size |
: |
1/8” to 1” |
Patterns |
: |
Straight / Angle |
Pressure Rating |
: |
PTFE – 6,000 PSI & High Pressure up to 15,000 PSI. GRAPHITE – 4,500 Psi. |
End Connections |
: |
NPT, BSPT, BSPP, Butt Weld, Socket Weld, Compression Fittings. |
Handle |
: |
Standard- CS Powder coated / SS Bar Type |
M.O.C |
: |
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 |
: |
PTFE: Max. up to 250 Deg. C
GRAPHITE: Max. up to 648 Deg. C. |
Orifice Dia. |
: |
3 mm to 9 mm |
Lubrication/Sealant |
: |
Anti-Seize: NEVER-SEEZ. Thread Sealant: LOCTITE 542 |
Testing |
: |
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 conical stem tip 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 ‘V’ & ball-type 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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