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SEMI F99-0705 © SEMI 2005 1 SEMI F99-0705 DIMENSIONAL SPECIFICATION OF A DIAPHRAGM VALVE FOR A METRIC PFA TUBE This specification was techni cally approved b y the Global Liquid Chem icals Committee. This edition w as ap…
SEMI F98-0305 © SEMI 2005 5
NOTICE: SEMI makes no warranties or representations as to the suitability of the standards set forth herein for any
particular application. The determination of the suitability of the standard is solely the responsibility of the user.
Users are cautioned to refer to manufacturer's instructions, product labels, product data sheets, and other relevant
literature, respecting any materials or equipment mentioned herein. These standards are subject to change without
notice.
By publication of this standard, Semiconductor Equipment and Materials International (SEMI) takes no position
respecting the validity of any patent rights or copyrights asserted in connection with any items mentioned in this
standard. Users of this standard are expressly advised that determination of any such patent rights or copyrights, and
the risk of infringement of such rights are entirely their own responsibility.
Copyright by SEMI® (Semiconductor Equipment and Materials
International), 3081 Zanker Road, San Jose, CA 95134. Reproduction of
the contents in whole or in part is forbidden without express written
fS
SEMI F99-0705 © SEMI 2005 1
SEMI F99-0705
DIMENSIONAL SPECIFICATION OF A DIAPHRAGM VALVE FOR A
METRIC PFA TUBE
This specification was technically approved by the Global Liquid Chemicals Committee. This edition was
approved for publication by the global Audits and Reviews Subcommittee on March 11, 2005. It was
available at www.semi.org in June 2005 and on CD-ROM in July 2005.
1 Purpose
1.1 This document specifies the outside dimensions of diaphragm valves used with metric PFA tubes in liquid
chemical distribution facilities and process equipment for semiconductor and flat panel display manufacturing.
2 Scope
2.1 This specification addresses dimensions of diaphragm valves used with metric PFA tubes except for face-to-
face dimensions. Since there are many seizes of fittings being applied to valves, this document doesn’t specify face-
to-face dimensions.
2.2 These diaphragm valves are limited to pneumatic valves. Specification for manual valves should be separately
provided as needed.
2.3 These diaphragm valves are used in chemical distribution systems for semiconductor and flat panel display
manufacturing.
2.4 The valves are made from materials such as PTFE or PFA, which have high corrosion resistance and low
contamination contribution to the fluid.
2.5 The valves withstand up to 0.2 megapascals (MPa) [29 pounds per square inch (psi)] back pressure.
NOTICE: This standard does not purport to address safety issues, if any, associated with its use. It is the
responsibility of the users of this standard to establish appropriate safety and health practices and determine the
applicability of regulatory or other limitations prior to use.
3 Referenced Standards
3.1 SEMI Standards
SEMI F65 — Dimensional Specification for Mounting Bases of Diaphragm Valves Used with Metric PFA Tubes
NOTICE: Unless otherwise indicated, all documents cited shall be the latest published versions.
4 Terminology
4.1 Abbreviations and Acronyms
4.1.1 PFA — Tetrafluoroethylene Perfluoroalkylvinylether
4.1.2 PTFE — Tetrafluoroethylene
4.2 Definitions
4.2.1 back pressure — a maximum allowable pressure applied to outlet of a diaphragm valve.
4.2.2 liquid chemicals — acid, alkali, organic solvent, and pure water used for wet stations; resists and developers
used for truck system; and other chemicals used for process or maintenance (such as slurry of CMP) of equipment or
facilities.
5 Dimensional Specifications
5.1 Overall Height Dimensions — The height (B) and (C) indicated in Figure 1 and the values for different tube
sizes are specified in Table 1.
SEMI F99-0705 © SEMI 2005 2
5.2 Port Height Dimensions — The height (A) indicated in Figure 1 and the values for different tube sizes are
specified in Table 1.
5.3 Body Dimensions — The length (D) and width (E) of the body indicated in Figure 1 and the values for different
tube sizes are specified in Table 1.
Ｃ
（with flow control）
Ｂ
Ａ
Ｅ
D
Ｄ
Figure 1
Top View of A Typical Diaphragm Valve
Table 1 Dimensional Specifications
Tube Size (mm) (OD /
ID)*
A (mm) B (mm) C (mm) D (mm) E (mm)
25/22 35–40 MAX 145 MAX 175 MAX 62 MAX 62
19/16 25–30 MAX 120 MAX 150 MAX 60 MAX 60
12/10 20–30 MAX 95 MAX 115 MAX 36 MAX 40
10/8 20–25 MAX 95 MAX 115 MAX 36 MAX 40
6/4 15–25 MAX 80 MAX 100 MAX 35 MAX 35
#1
OD and ID are the outside diameter and inside diameter of the tube respectively.
#2
As seen above, dimensions of A are specified by the range, and dimensions from B to E are specified as maximum dimensions that are to be
considered as targets.
6 Measurements
6.1 The mounting base must be conditioned for a minimum of one hour in an air environment of 23 3ºC
(73.4 5.4ºF) prior to measuring the dimensions.
NOTICE: SEMI makes no warranties or representations as to the suitability of the standards set forth herein for any
particular application. The determination of the suitability of the standard is solely the responsibility of the user.
Users are cautioned to refer to manufacturer's instructions, product labels, product data sheets, and other relevant
literature, respecting any materials or equipment mentioned herein. These standards are subject to change without
notice.
By publication of this standard, Semiconductor Equipment and Materials International (SEMI) takes no position
respecting the validity of any patent rights or copyrights asserted in connection with any items mentioned in this
standard. Users of this standard are expressly advised that determination of any such patent rights or copyrights, and
the risk of infringement of such rights are entirely their own responsibility.
Copyright by SEMI® (Semiconductor Equipment and Materials
International), 3081 Zanker Road, San Jose, CA 95134. Reproduction of
the contents in whole or in part is forbidden without express written
consent of SEMI.