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Mars series 88 heavy duty, three piece
ball valve with reinforced PTFE seats/seals (other seat options
are available, please contact our sales office), a raised
ISO 5211 mounting pad and square stemed top for direct actuation.
Ends can be specified as BSP screwed or socket weld, other
end types are available, please contact our sales office.
A latch lock lever supplied as standard.
The valve has a blow out proof stem and
an antistatic device between the stem and body and stem and
ball. Fully encapsulated body seals allows welding in line
without disassembly.
The high cycle life stem design is accomplished
by a double sealing system. The 45° Pyramidal Segment
Ring in conjunction with a seal that fits on top of the Pyramidal
segment provides the primary seal. Most of the media in the
pipeline is contained by this seal. As a precautionary measure
a V ring chevron packing provides the secondary sealing. On
top of the stem is a set of Belleville washers that automatically
adjusts compression to the seal to compensate for wear, pressure
or temperature fluctuations.
Specification:
| Body Constuction: |
Cast two piece body, reduced bore (full bore available,
please contact our sales office). |
| Body: |
CF8M (DIN 1.4408) stainless steel or WCB (DIN 1.0619)
carbon steel. |
| Temperature: |
-60°F (-51°C) to 420°F (215°C). |
| Pressure: |
1/4" - 1" 2000 psi (138 bar)
1.1/4" - 2" 1500 psi (103 bar)
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| Ball & Stem |
316 stainless steel. |
The above specification is for the valve
body, the specification of the reinforced PTFE seats will
vary. They have a maximum pressure rating of 1500 psi (103
bar) at 100°F (38°C) degrading to a maximum temperature
of 420° (215°C).
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