REGISTRATION RIGHTS AGREEMENT

         This  Registration  Rights Agreement dated as of May 7, 1998 is between
Helix Technology  Corporation (the "Company"),  a Delaware corporation,  and the
persons  named on Schedule A attached  hereto who have  executed and delivered a
Stockholder  Letter (the  "Holders").  This  Agreement  is made  pursuant to the
Agreement and Plan of Merger dated as of April 16, 1998 (the "Merger Agreement")
among the  Company,  Helix  Acquisition  Corporation  ("Acquisition  Corp."),  a
Washington corporation and wholly-owned  subsidiary of the Company,  Granville -
Phillips  Company  ("GPC"),   a  Washington   corporation,   and  the  principal
stockholders  of GPC  named  therein.  The  Merger  Agreement  provides  for the
Company's  acquisition of GPC through the merger of Acquisition  Corp.  into GPC
(the  "Merger")  and the exchange by the Holders of their shares of common stock
of GPC for shares of common stock of the Company (the "Helix Shares").  In order
to induce GPC to enter  into the Merger  Agreement,  the  Company  has agreed to
provide the Holders with the registration rights set forth in this Agreement.

         The parties hereto agree as follows:

         Section 1.  Definitions.  As used in this Agreement, the following 
terms have the following meanings:

         "Commission" means the United States Securities and Exchange 
Commission.

         "Exchange  Act" means the  Securities  Exchange Act of 1934, as amended
from time to time, and the rules and regulations of the Commission thereunder.

         "Prospectus"   means  the  prospectus   included  in  any  Registration
Statement   (including,   without   limitation,   a  prospectus  that  discloses
information  previously  omitted from a prospectus filed as part of an effective
registration  statement in reliance upon Rule 430A under the Securities Act), as
amended  or  supplemented  by  any  prospectus  supplement,  and  by  all  other
amendments  and   supplements  to  the  prospectus,   including   post-effective
amendments, and in each case including all material incorporated by reference or
deemed to be incorporated by reference in such prospectus.

         "Registration  Statement"  means  any  registration  statement  of  the
Company that covers any of the Helix Shares  pursuant to the  provisions of this
Agreement and all amendments and supplements to any such registration statement,
including post-effective  amendments, in each case including the Prospectus, all
exhibits,   and  all  material   incorporated  by  reference  or  deemed  to  be
incorporated by reference in such registration statement.

         "Securities Act" means the Securities Act of 1933, as amended from time
to time, and the rules and regulations of the Commission thereunder.


         Section 2.  Resale Registration.

         (a) As soon as practicable after the effective date of the Merger,  the
Company  will  file a  Registration  Statement  on  Form  S-3  (or  any  similar
registration  statement  then in effect) under the  Securities  Act covering the
resale  by each  Holder  of such  Holder's  Helix  Shares  from  time to time in
transactions  not involving an underwritten  public offering and will thereafter
use  reasonable  efforts  to cause the  Registration  Statement  to be  declared
effective by the  Commission as soon as  practicable  thereafter and to keep the
Registration  Statement continuously effective until the earlier of (x) the date
on which the  Holder no longer  holds  any  Helix  Shares  registered  under the
Registration  Statement  or (y) the date on which the Helix  Shares would become
eligible for sale pursuant to Rule 144 (or any similar provision then in effect)
under the Securities Act without  regard to any tolling  provisions  that may be
applicable. In this connection:

                  (i) The  Company  will  promptly  (subject  to  Section  2(b))
         prepare and file with the Commission such amendments and post-effective
         amendments  to the  Registration  Statement as may be necessary to keep
         the Registration  Statement  effective for as long as such registration
         is required to remain effective hereunder; will cause the Prospectus to
         be  supplemented  by any  required  Prospectus  supplement,  and, as so
         supplemented,  to be filed  pursuant  to Rule 424 under the  Securities
         Act;  and  will  comply  with  the  provisions  of the  Securities  Act
         applicable  to it with respect to the  disposition  of all Helix Shares
         covered by such Registration  Statement during the applicable period in
         accordance with the intended  methods of disposition by the Holders set
         forth in the Registration Statement or supplement to the Prospectus.

                  (ii) The  Company  will  promptly  furnish to each Holder such
         number  of  copies  of  the  Prospectus   (including  each  preliminary
         Prospectus) and any amendments or supplements thereto as the Holder may
         reasonably  request in order to  facilitate  the  public  sale or other
         disposition of the Helix Shares being sold by the Holder.

                  (iii) The Company  will,  on or prior to the date on which the
         Registration Statement is declared effective, use reasonable efforts to
         register  or  qualify  the Helix  Shares  covered  by the  Registration
         Statement under such other securities or "blue sky" laws of such states
         of the United States as any Holder requests;  provided,  however,  that
         the Company  shall not be required to qualify  generally to do business
         in any jurisdiction where it would not otherwise be required to qualify
         or to file any general consent to service of process.

                  (iv) The Company will timely file all documents required to be
         filed by it under the Exchange Act.

                  (v) The Company will  promptly  give notice to each Holder (1)
         when the  Prospectus or any  Prospectus  supplement  or  post-effective
         amendment  has  been  filed  and,  with  respect  to  the  Registration
         Statement  or any  post-effective  amendment,  when the same has become
         effective, (2) of any request by the Commission or any state securities
         authority for amendments and supplements to the Registration  Statement
         and Prospectus or for  additional  information  after the  Registration



         Statement has become  effective,  (3) of the issuance by the Commission
         of any stop order  suspending  the  effectiveness  of the  Registration
         Statement,  (4) of the issuance by any state  securities  commission or
         other regulatory authority of any order suspending the qualification or
         exemption  from  qualification  of any of the Helix  Shares under state
         securities  or "blue  sky" laws and (5) of the  happening  of any event
         which makes any statement made in the Registration Statement or related
         Prospectus  untrue or which  requires  the making of any changes in the
         Registration  Statement or Prospectus so that they will not contain any
         untrue  statement of a material fact or omit to state any material fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein,  in light of the circumstances under which they were made, not
         misleading.   As  soon  as  practicable  following  expiration  of  the
         Suspension Period (as defined below), the Company will prepare and file
         with the  Commission  and furnish a  supplement  or  amendment  to such
         Prospectus so that, as thereafter  deliverable to the purchasers of the
         Helix Shares,  such Prospectus will not contain any untrue statement of
         a material fact or omit to state a material fact  necessary to make the
         statement therein,  in light of the circumstances under which they were
         made, not misleading.

         (b) Upon receipt of a notice  under  clauses (2) through (5) of Section
2(a)(iv)  (a  "Suspension  Notice"),  each  Holder  will  forthwith  discontinue
disposition of the Helix Shares pursuant to the Registration Statement until the
Holder's  receipt  of the  copies  of the  supplemented  or  amended  Prospectus
contemplated by Section  2(a)(iv) or until the Holder is advised in writing (the
"Advice") by the Company that the use of the Prospectus may be resumed,  and has
received copies of any additional or supplemental filings which are incorporated
by reference in the Prospectus,  and, if so directed by the Company,  the Holder
will deliver to the Company (at the  Company's  expense) all copies,  other than
permanent  file  copies  then  in the  Holder's  possession,  of the  Prospectus
covering  the  Helix  Shares  current  at the time of  receipt  of such  notice;
provided,  however,  that in no event will the period from the date on which any
holder  receives a  Suspension  Notice to the date on which any Holder  receives
either  the  Advice  or  copies  of  the  supplemented  or  amended   Prospectus
contemplated by Section 2(a)(iv) (the "Suspension Period") exceed 90 days.

         Section 3.  Registration  Expenses.  The Company will bear all expenses
incurred in connection  with the  registration  of the Helix Shares  pursuant to
Section 2,  including  without  limitation  all printing,  legal and  accounting
expenses incurred by the Company and all registration and filing fees imposed by
the Commission,  any state  securities  commission or The Nasdaq National Market
or,  if the  common  stock of Helix is not then  listed on The  Nasdaq  National
Market, the principal national  securities exchange or national market system on
which the common stock is then traded or quoted. Each Holder will be responsible
for  any  brokerage  commissions  and  taxes  of any  kind  (including,  without
limitation, transfer taxes) with respect to any disposition, sale or transfer of
the  Holder's  Helix  Shares and for any legal,  accounting  and other  expenses
incurred by the Holder.

         Section 4.  Indemnification.

         (a) Indemnification by the Company. The Company agrees to indemnify and
hold harmless,  to the full extent permitted by law, each Holder,  its partners,
officers,  directors,  trustees,  stockholders,  employees and agents,  and each
person who controls such Holder  within the meaning of either  Section 15 of the
Securities  Act or Section 20 of the Exchange  Act, or is under  common  control



with, or is controlled by, such Holders,  together with the partners,  officers,
directors,  trustees,  stockholders,  employees  and agents of such  controlling
person (collectively,  the "Controlling Persons"),  from and against all losses,
claims,  damages,   liabilities  and  expenses,   including  without  limitation
reasonable  legal  fees  and  expenses  incurred  by  any  Holder  or  any  such
Controlling Person documented in writing, (collectively, the "Damages") to which
such  Holder  and any such  Controlling  Persons  may become  subject  under the
Securities Act or otherwise,  insofar as such Damages (or proceedings in respect
thereof) arise out of or are based upon any untrue or alleged  untrue  statement
of material  fact  contained in the  Registration  Statement  (or any  amendment
thereto),  or caused by any  omission  or alleged  omission  to state  therein a
material  fact  necessary  to  make  the  statements  therein  in  light  of the
circumstances under which they were made not misleading, or caused by any untrue
statement  or alleged  untrue  statement  of a material  fact  contained  in any
Prospectus (as amended or  supplemented  if the Company shall have furnished any
amendments  or  supplements  thereto),  or caused  by any  omission  or  alleged
omission  to state  therein a material  fact  necessary  to make the  statements
therein in light of the circumstances under which they were made not misleading,
except  insofar as such  Damages  arise out of or are based upon any such untrue
statement or omission based upon  information  relating to such Holder furnished
in writing to the Company by such Holder specifically for use therein; provided,
however,  that the Company  shall not be liable to any Holder under this Section
4(a) to the  extent  that any such  Damages  were  caused  by the fact that such
Holder  sold Helix  Shares to a person as to whom it shall be  established  that
there was not sent or given,  at or prior to the  written  confirmation  of such
sale, a copy of the Prospectus as then amended or  supplemented  if, and only if
(i) the Company has previously  furnished copies of such amended or supplemented
Prospectus  to such  Holder  and (ii) such  Damages  were  caused by any  untrue
statement or omission or alleged untrue  statement or omission  contained in the
Prospectus  so delivered  which was  corrected  in such amended or  supplemented
Prospectus.

         (b) Indemnification by the Holders.  Each Holder agrees,  severally and
not jointly, to indemnify and hold harmless the Company, its directors, officers
and each person,  if any, who controls the Company  within the meaning of either
Section 15 of the  Securities  Act or Section 20 of the Exchange Act to the same
extent as the foregoing indemnity from the Company to such Holder, but only with
reference  to  information  relating to such Holder  furnished in writing to the
Company by such Holder  specifically for use in the  Registration  Statement (or
any  amendment  thereto)  or any  Prospectus  (or any  amendment  or  supplement
thereto);  provided, however, that such selling Holder shall not be obligated to
provide such  indemnity to the extent that such Damages  result from the failure
of the Company to promptly  amend or take  action to correct or  supplement  the
Registration  Statement or Prospectus on the basis of corrected or  supplemental
information  provided by such Holder to the Company  expressly for such purpose.
In no event  shall the  liability  of any Holder of Helix  Shares  hereunder  be
greater in amount than the amount of the  proceeds  received by such Holder upon
the sale of the Helix Shares giving rise to such indemnification obligation.

         (c)  Procedure.  Each  party  entitled  to  indemnification  under this
Section 4 (the "Indemnified  Party") shall give prompt notice of any claim as to
which   indemnification   may  be  sought  to  the  party  required  to  provide
indemnification (the "Indemnifying  Party"),  provided that failure to give such
notice shall not relieve the  Indemnifying  Party of its  obligations  hereunder
except to the  extent of  actual  prejudice.  The  Indemnifying  Party  shall be
entitled  to assume  the  defense  of any such  claim  with  counsel  reasonably
satisfactory to the Indemnified  Party. The Indemnified Party may participate in



such defense at its own expense,  provided that the Indemnifying  Party will pay
such expense if  representation of the Indemnified Party by the counsel retained
by the  Indemnifying  Party would be  inappropriate  due to actual or  potential
differing   interests   between  the  Indemnified  Party  and  any  other  party
represented by such counsel in such  proceeding.  No  Indemnifying  Party shall,
except with the consent of the Indemnified  Party,  agree to any settlement that
does not  include a release  of the  Indemnified  Party  from all  liability  in
respect of such  claim,  and the  Indemnified  Party shall not settle such claim
without the prior written consent of the Indemnifying Party.

         Section 5.  Miscellaneous.

         (a) Amendments and Waivers. This Agreement may not be amended, modified
or supplemented except in writing signed by the party to bound thereby.

         (b)  Notices.  All notices  and other  communications  provided  for or
permitted  hereunder  shall be in writing  and shall be deemed to have been duly
given if delivered  personally  or sent by  telecopier,  registered or certified
mail (return  receipt  requested),  postage prepaid or courier to the parties at
their  respective  addresses set forth on the signature pages hereof (or at such
other address for any party as shall be specified by like notice,  provided that
notices of a change of address  shall be effective  only upon receipt  thereof).
All such notices and communications shall be deemed to have been received at the
time delivered by hand, if personally delivered;  five business days after being
deposited in the mail, postage prepaid, if mailed; when receipt is acknowledged,
if  telecopied;  and on the next  business day if timely  delivered to a courier
guaranteeing overnight delivery.

         (c) Successors and Assigns.  This Agreement  shall inure to the benefit
of and be binding upon the  successors  and assigns of the Company and the heirs
and legal  representatives of the Holders. This Agreement may not be assigned by
any Holder and any attempted assignment shall be void and of no effect and shall
terminate all obligations of the Company hereunder with respect to such Holder.

         (d)  Counterparts.  This  Agreement  may be  executed  in any number of
counterparts and by the parties hereto in separate  counterparts,  each of which
when so  executed  shall be  deemed  to be an  original  and all of which  taken
together shall constitute the same agreement.

         (e) Headings.  The headings in this  Agreement are for  convenience  of
reference only and shall not limit or otherwise affect the meaning hereof.

         (f) Governing Law. This Agreement  shall be governed by the laws of the
Commonwealth of Massachusetts without regard to principles of conflicts of law.






         IN WITNESS WHEREOF,  the parties have caused this  Registration  Rights
Agreement to be executed as of the date stated above.

                                    THE COMPANY:

                                    HELIX TECHNOLOGY CORPORATION
                                    Mansfield Corporate Center
                                    Nine Hampshire Street
                                    Mansfield, MA 02048-9171



                                    By:/s/ Robert J. Lepofsky
                                       Robert J. Lepofsky
                                       President and Chief Executive Officer





                                   SCHEDULE A

                             Holders of Helix Shares


                           David B. Adler

                           Paul Clarke Arnold

                           Brian M. Bills

                           Daniel G. Bills

                           June M. Bills

                           Steven W. Black

                           Michael D. Borenstein

                           Carolyn R. Bundy

                           Gordon L. & Carolyn R. Bundy
                            as Joint Tenants & Not
                            as Tenants in Common

                           Scott R. Dix

                           Edward E. & Virginia V. Donaldson
                            as Joint Tenants with Right
                            of Survivorship

                           Norman R. & Elsie B. Eifler
                            as Joint Tenants & Not as
                            Tenants in Common

                           Fiduciary Trust Co. of N.Y.,
                           Degel & Co.

                           Tamara A. Harland

                           Daniel F. Hauser

                           Jerry B. Howard

                           Kathryn L. Kenigsberg

                           Anita Liane (Bills) McMillin

                           Richard L. Mellecker


                           George F. Menkick

                           Donald R. Miller, Trustee
                            of the Adeline V. Miller
                            Family Testamentary Trust

                           Donald R. Miller, Trustee
                            of the Donald R. Miller
                            Revocable Living Trust,
                            Dated: October 15, 1992

                           Eileen O'Donoghue-Cooper

                           Stephen L. Parrish

                           Diane L. (Bills) Paukstis

                           J. Frederick Pingree, Jr.

                           Sheila D. Purvis

                           William A. Ringer

                           Kristie K. Skiles

                           William D. III & Charlotte C.
                            Stewart, as Joint Tenants &
                            Not as Tenants in Common

                           Keith A. & Betty B. Warren
                            as Joint Tenants with
                            Right of Survivorship and
                            Not as Tenants in Common

                           Robert M. Willis

                           Gold I Trust
                            Brian M. Bills and Anita
                            Liane McMillin, Trustees

                           Gold II Trust
                            Brian M. Bills and Anita
                            Liane McMillin, Trustees


                           Platinum I Trust
                            Diane L. Paukstis and
                            Anita Liane McMillin, Trustees

                           Platinum II Trust
                            Diane L. Paukstis and
                            Anita Liane McMillin, Trustees

                           Silver I Trust
                            Brian M. Bills and Diane L. Paukstis,
                            Trustees

                           Silver II Trust
                            Brian M. Bills and Diane L. Paukstis,
                            Trustees