Dwyer L4 - Manual (Page 2)

PARTS LIST
1. Cover lock. (ATEX/IECEx unit only).
2. External ground. (ATEX/IECEx unit only).
3. Enclosure housing and cover.
4. Terminal block. (ATEX/IECEx unit only,
UL/CSA unit has 6˝ leads).
5. Internal ground.
*6. Magnet arm and switch assembly.
7. Switch body.
*8. Float, arm and block assembly.
*Approved replacement parts
ATEX/IECEx unit
UL/CSA unit
L4-SS-D-C-F2C1
Side Mount, Brass Body, SPDT Switch
Top Mount, Brass Body, SPDT Switch (Specify rod length)
316 SS Body with 430 SS Magnet Keeper
316 SS Body and Magnet Keeper (Order with SS option)
Nickel 20 Magnet Keeper
DPDT Switch
2-1/2˝ Spherical, 304 SS rated 50 psi (3.5 bar), > 0.5 s.g.
2-1/2˝ Spherical, 316 SS rated 150 psi (10.3 bar), > 0.7 s.g.
2-1/2˝ Spherical, 304 SS rated 300 psi (20.7 bar), > 0.7 s.g.
ATEX
IECEx
Epoxy Coated Housing
High Temperature* (See specifications for rating)
Gold Contact Snap Switch* (See specifications for rating)
Neoprene Boot*
No Electrical Housing*
Terminal Block Wire Connections*
Time Delay Relay* (On flow decrease)
Time Delay Relay* (On flow increase)
Flange Process Connection
2˝
3˝
4˝
Carbon Steel
316 SS
150 #
300 #
600 #
900 #
Bushing Process Connection
2˝
2-1/2˝
4˝
Hex
Flush
Brass
Carbon Steel
316 SS
304 SS Example
Construction
Wetted Material
Options
Switch Options
Float Options
Other Options
Flange*
Flange Size
Flange Material
Flange Rating
Bushing*
Bushing Size
Bushing Type
Bushing
Material
L4
L4
L4-TOP SS
SS
316
NI
D
D
50
150
300
C
AT
IEC
EPOXY
MT
MV
NB
NH
TBC
TRD
TRI
F
F
B
2
2
3
4
1
2
4
C
C
S
H
F
1
1
3
6
9
B
C
S
4
* Options that do not have ATEX or IECEx
Attention: Units without the “AT” suffix are not Directive 94/9/EC (ATEX) compliant. These units are not intended for use in potentially hazardous atmospheres in the EU.
These units may be CE marked for other Directives of the EU.
19-7/32
[488.16]
Ø1-5/8
[41.28]
5
[127.00]
6
[152.40]
MAGNET
KEEPER
430 STNLS.
STL.
FLOAT
316 STNLS. STL
(STANDARD)
FLOAT ARM & BLOCK
316 STNLS. STL.
OR BRASS
SWITCH BODY
BRASS OR
316 STNLS. STL.
1-1/2 MALE NPT
MOUNTING CONNECTION
16 GA. LEADS
6 [152.40] LONG
3
[76.20]
5
[127.00]
8-7/32
[208.76]
Ø2-1/2
[63.50] 3-11/32
[84.93]
3/4 FEMALE NPT
CONDUIT
CONNECTION
1-5/8
[41.28]
5
[127.00]
6
[152.40]
19-7/32
[488.16]
8-7/32
[208.76]
5
[127.00]
3
[76.20] 3/4 NPT
1-1/2 NPT
2-1/2
[63.50] 3-11/32
[84.93]
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