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Standard Dcaole-Wall
<br />Tanks
<br />Standard Double -Wall Tank
<br />Specifications
<br />Tank Modal
<br />75
<br />(Gallons) (Gallons
<br />DWr-4P(4)
<br />550
<br />550
<br />548
<br />QVi-41'(4)
<br />1,000
<br />1,000
<br />971
<br />DWT -2P(6)
<br />2,500
<br />2,500
<br />2,385
<br />DWT -2P(6)
<br />4,000
<br />4,000
<br />3,914
<br />"DWT -2P(6)
<br />6,000
<br />6,000
<br />5,994
<br />DWT -21'(8)
<br />6,000
<br />6,000
<br />5,930
<br />DWr-2P(8)
<br />8,000
<br />8,000
<br />7,830
<br />Number
<br />of 4" NPT
<br />Primary
<br />Motlel q�
<br />With 11165q
<br />4-:
<br />sis d 1�
<br />rfiln
<br />FM1mps ffi,
<br />sl,oeM1 _.1 fitn-
<br />6i
<br />6'1.0. 696IP
<br />19" 19
<br />6"
<br />6'11-0l6"
<br />Number Cavity
<br />of 4" Spacing
<br />Tank Between
<br />Tank Monitoring- Inner and
<br />Diameter Fittings Outer Tank
<br />3.. 650 -
<br />75
<br />6' 114/8" 4'
<br />3 - 950
<br />140
<br />11'6.1/8" 4'
<br />4 1,800
<br />180
<br />12'7-1/2" 6'
<br />6 2,500
<br />270
<br />19' 11-1/2" 6'
<br />6 3,400
<br />405
<br />29'9-112" 6'
<br />6 3,400
<br />340
<br />19'9' 8'
<br />6 4,200
<br />425
<br />25'3" 8'
<br />6 5,000
<br />650
<br />3019" e'
<br />'.6. -_ 6,000
<br />585.
<br />36' 3" e'
<br />DWT -2P(10) 15,000 15,000 14,783 1 6 8,5D0 -7,020 29' 1" 10'
<br />DWr-2P(10) 20,000 20,000 20,168 1 6 11,000 1,364 38'3" 10'
<br />-includes filling in Fiberglas reservoir
<br />The 6000 gallon DWT -21'16) is standard at Mt Union, PA plant only. At all other plants, DWT -2P(6) 6000 model is made-to-oMer
<br />Standard Tank Notes
<br />1. Standard pipe fittings to the
<br />primary tank are 4" NPT
<br />half couplings. All tanks
<br />2,500 gallon capacity and
<br />larger include one manway
<br />with three fittings to the pri-
<br />mary tank located in the
<br />manway cover. All other
<br />primary tank fittings are
<br />mounted on the tank. Addi-
<br />tional manways and tank
<br />fittings are available on
<br />made-to-order tanks.
<br />2. Tank bottom deflector plates
<br />are standard under every
<br />manway and fitting.
<br />3. Bumper pads are standard
<br />on all tanks 6' diameter and
<br />larger. The pads provide
<br />added protection to the
<br />tank prior to installation.
<br />4. All Model "P" tanks include
<br />a Fiberglas reservoir, used
<br />for leak monitoring, integrally
<br />constructed to the tank top.
<br />The reservoir incudes nne
<br />4" NPT ha if coupling littiny
<br />mounted on the top of the
<br />reservoir allowing access to
<br />the cavity between the inner
<br />and outer tank walls.
<br />5. In addition to the
<br />monitoring fitting located in
<br />the Fiberglas reservoir,
<br />tanks 1,000 gallon capacity
<br />and larger include additional
<br />monitoring fittings (4" NPT)
<br />located at the tank top. See
<br />the tank specifications for
<br />the number of monitoring
<br />fittings for each tank size.
<br />6. Anchoring strap locations
<br />are indicated by arrows on
<br />the side of the tank.
<br />7. Monitoring capabilities -the
<br />following restrictions apply
<br />for the various types of
<br />double-wall tank monitors:
<br />a) Hydrostatic T:n;;
<br />Monitor -tank burial depth
<br />must not exceed 7' from
<br />tank top to finish grade.
<br />The monitoring cavity
<br />rnhe vented to the
<br />co.foosphere. the optional
<br />reservoir sensur, supplied
<br />by O/C Tanks, is designed
<br />to automatically vent the
<br />monitoring cavity.
<br />b) Liquid sensors -when
<br />normally "dry" cavity
<br />monitors (which detect
<br />the presence of a liquid)
<br />are used, the cavity
<br />between the inner and
<br />outer tank may be either
<br />vented to the atmosphere
<br />or sealed.
<br />c) Vacuum monitoring -
<br />when vacuum monitoring
<br />is used, the maximum
<br />vacuum is 3" mercury
<br />(1.5 psi maximum).
<br />d) Positive air -pressure
<br />monitoring -when
<br />positive air pressure
<br />monitoring is used, the
<br />maxiinum air pressure is
<br />3 psi.
<br />e) Gasoline vapor sensors -
<br />when gasoline vapor
<br />sensors are used, the
<br />cavity hetween the inner
<br />and elft_ r tame finny he
<br />either vented io til::
<br />atmosphere or sealed.
<br />3
<br />1-r,/8"
<br />3
<br />1-118"
<br />3
<br />1-1/8"
<br />3
<br />1-1/8"
<br />3
<br />1-r,/8"
<br />3
<br />1-118"
<br />3
<br />13/4"
<br />to automatically vent the
<br />monitoring cavity.
<br />b) Liquid sensors -when
<br />normally "dry" cavity
<br />monitors (which detect
<br />the presence of a liquid)
<br />are used, the cavity
<br />between the inner and
<br />outer tank may be either
<br />vented to the atmosphere
<br />or sealed.
<br />c) Vacuum monitoring -
<br />when vacuum monitoring
<br />is used, the maximum
<br />vacuum is 3" mercury
<br />(1.5 psi maximum).
<br />d) Positive air -pressure
<br />monitoring -when
<br />positive air pressure
<br />monitoring is used, the
<br />maxiinum air pressure is
<br />3 psi.
<br />e) Gasoline vapor sensors -
<br />when gasoline vapor
<br />sensors are used, the
<br />cavity hetween the inner
<br />and elft_ r tame finny he
<br />either vented io til::
<br />atmosphere or sealed.
<br />
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