Page 47 - Apollo - Industrial Applications Guide

APPENDIX G –MOST FREQUENTLY ASKED QUESTIONS & ANSWERS APPENDIX G –MOST FREQUENTLY ASKED QUESTIONS & ANSWERS

SEAT MATERIAL Yes, the Three-Piece and the Flanged Ball valves were submitted
to United Valves, Houston, TX, in 2009 for testing. The Apollo®

1. 1 Can Apollo® provide metal-to-metal Seats in the Stem design used for these two designs past the Torque and
Failure requirements of API-591. Upon requests, Apollo® will
Three-Piece valve?
make the test results available for review.
No, Apollo® does not offer Metal-to-Metal Seats at this time. TRIM MATERIAL

2. 2 What seat material is recommended for . . . 1. 1 Can Apollo® offer a 17-4 PH Stem for a particularly
(a specific service)? high torque services?

Please refer to Appendix D of this book for the characteris- Yes, providing it is the appropriate material for the service, and
tics of the individual materials. Things to check for regarding an understanding that there is an additional charge for the
acceptability are material compatibility and the pressure/ special material.
temperature charts found on the spec sheets of each valve
provided on our web site or in the engineering section “M” of our 2. 2 Does Apollo® offer valves with Stellite® trim?
industrial binder. If this data is insufficient to make a selection,
please contact the Apollo Technical Services Group. No, this is generally used in reference to metal-to-metal seated

3. 3 What is “Multiseal” or “TFM”? valves which are not yet offered by Apollo.
3. 3 Does Apollo® offer Cavity Fillers for the Ball Valves?
Apollo® Multiseal Seats, or TFM™ Seats, are a molecularly
modified form of PTFE, and a product of Dyneon™. Apollo® Only the Three-Piece valves (83A/B & 86A/B) have cavity fillers
uses Dyneon, TFM 1600 as standard seating material for all designed for the valve.
Three-Piece Steel Ball valves. This seat material eliminates the
need to offer PTFE, RPTFE, and Carbon-Graphite filled PTFE. 4. 4 Does Apollo® offer “V”- ported Ball and Seats?
TFM 1600 is also offered as an optional seat material in our
Apollo Flanged End valves, 87A/88A Series (“-80”) suffix and is No, Apollo® does not offer V-ported Ball and Seat trim at this time.
a common Top Entry Valve Seat material. For more information
on specific seat materials refer to Appendix D of this document. SPECIFIC SERVICES

4. 4 What is “Multifill” (aka CRPTFE); is it the same thing 1. 1 What is the upper limit for steam pressures on
as multiseal? Apollo® soft seated valves?

No. Apollo® Multifill seats are carbon and graphite reinforced The upper limit for Apollo® glass reinforced PTFE seated valves
PTFE. Apollo® uses Multifill in a lot of steam saturated steam in saturated steam is 150 psig (377°F). Valves with carbon-
applications below 250 psig. This product is available in our graphite reinforced PTFE seats extend to 250 psig maximum
Two Piece, 3 Way, Flange, Union End and Top Entry Valves. For (406°F).
more information on specific seat materials refer to Appendix D
2
of this document. 2. What is the limit of our hard seated valves in steam

5. 5 Can I get the Three-Piece valve with Virgin Teflon™ Seats? service?
For saturated steam service our TEV’s (ASME class 300 or higher)
There is no advantage in specifying virgin TFE. The standard seat with carbon graphite seats are rated to 300 psig (422°F)
in the Three-Piece, Multiseal, will provide similar torques, better
3
durability, and it is FDA approved for food service grade. Please 3. Can I use SS for Chlorine service?
refer to Appendix D for additional information regarding Multiseal.
No, stainless steel is not good for high chloride content media.
6. 6 Has Apollo® submitted Ball valves to a third party Chloride stress cracking can occur and cause valve failure.
for testing in accordance with API-591?

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