Page 5 - Mars catalog

MARS UNIQUE SEALMAX STEM DESIGN - MAINTENANCE FREE - TRIPLE SEALING
®
SYSTEM - LIVE LOADED STEM PACKING - EXTREMELY HIGHT CYCLE - PROVIDES

OPTIMUM STEM SEALS

5.
1. PYRAMIDAL STEM WITH STEM SEAL 5. STEM NUT
6.
First stage of defense against leakage. The Compress the entire stem system to
45 degree slope of the stem accompany 4. 7. enable blocking of leakage.
the stem seal effectively blocks all leak path
during rotation. 3. 9. 6. BELLEVILLE WASHERS
Automatically compress the seals
2. O-RING STEM PACKING 2.
to adjust for wear, pressure, and
Second stage of defense against leakage, 1. 8. temperature fluctuations.
enhances stem seal and maintains stem
alignment, provides extra longer service life. 7. GLAND
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3. V-RING STEM PACKING Made of stainless steel, equally
4. 6. distributes the compressive force on
Third stage of defense against leakage. the packing and seal.
multiple layers of V-Ring Chevron Packing 7.
expands side way as it is being compressed, 3. 9. 8. ANTI-STATIC DEVICE
blocking all air pockets to prevent leak path. Spring loaded stem-to-ball and
8. stem-to-body anti-static device as
4. LOCK SADDLE 1.
standard
Stabilizes the entire stem nut to keep it from
loosening during operation. 9. SUPER SMOOTH STEM FINISH
Reduces seal friction and operating
torque, prolongs service life.

MARS BALL VALVE SEAT APPLICATION GUIDE

Mars valve offers a wide choice of soft seats and metal seats for variety of industry applications, all of the following
applications should be used in conjunction with the pressure temperature graph and the corrosion chart.

PTFE(P) MG1241(M)
Made from Virgin Teflon, this is the most common sealing 75% PTFE + 20% Glass Fiber + 5% Graphite, good for
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material, its chemical compatibility is excellent for almost all temperature from - 50 F to 450 F, this material offers a wide
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media. Temperature-50 F to 400 F , Color - White. temperature range with better life than R-PTFE.
PTFE Cavity Filled Seats Available on request(PF) Color - Pale Black.
R-PTFE(R) DELRIN(D)
15% glass reinforced PTFE, suitable for Temperature - This material is very rigid, suitable for high pressure up to
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50 F to 450 F, chemical resistance is compatible to virgin 5000 psi dependent on valve size and temperature range of
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PTFE with better wear factor. Color - Off White. - 50 F to 180 F. Color - Creamy White.
Carbon filled PTFE(C) PEEK(K)
25% Carbon powder with 75% PTFE,this material offers Best suited for high temperature and pressure
a wide temperature range with good wear resistance than service,suitable for tobacco and nuclear service.
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RTFE. Suitable for steam service. Temperature ration - 70 F to 550 F. Color - Black
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Temperature - 50 F to 450 F. Color - Black.
UHMW Polyethylene(U)
Stainless Steel filled PTFE(S)
Ultra-high molecular weight polyethylene, ideal for use
50% stainless steel powder filled 50% PTFE, offers in low level radiation service, this material also meets
abrasion resistance of metal with higher pressure and the requirements of the Tobacco industry where PTFE is
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temperature than RTFE. Temperature - 50 F to 470 F. prohibited and it offers an excellent resistance to abrasive
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Color - Dark Grey. media. Temperature rating-70 F to 200 F. Color - Opaque
White.
PFA-TFM1600(T)
Metal Seats(A)
The new generation of PTFE, offers better creep resistance,
low coefficient of friction, ideal for semi-conductor, For service with severe flashing or hydraulic sock, abrasive
Hi-purity service. media

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