Specifications

ManualsBrandsMurphy ManualsSwitchL1100

Installation 00-02-0175 page 1 of 6

Installation for L1100, L1200, L1200N Series

Liquid Level Switches and DVU150, DVU175,

and DVU2105/2115/2120 Series Dump Valves

00-02-0175

Revised 03-06

Section 15

Please read the following instructions before installing. A visual inspection for damage during shipping is recommended before mounting.

GENERAL INFORMATION

WARNING

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

✔✔

Disconnect all electrical power to the machine.

✔✔

Make sure the machine cannot operate during installation.

✔✔

Follow all safety warnings of the machine manufacturer.

✔✔

Read and follow all installation instructions.

✔✔

OBSERVE all pressure and electrical ratings and require-

ments for the devices and the operating environment.

✔✔

BE SURE all pressure HAS BEEN REMOVED from the

vessel before opening any pressure connections.

Products covered by this literature comply with EMC Council directive 89/336/EEC regarding electromagnetic compatibility.

Description

Series L1100 and L1200 Liquid Level Switches are float activated to

operate an electrical SPDT snap switch (optional DPDT on some models) for alarm

or shutdown of an engine or electric motor. They screw directly into the wall of the

vessel. Series L1200 can also be used with a weld collar or external float chamber.

Series L1200N is a float-activated, pneumatic-vent level device used to operate dump

valves or similar devices. This model screws directly into the vessel or can be

mounted via an external float chamber. It cannot be used with weld collar 15050375.

Model variations include a dump valve operator with or without a filter/pressure

regulator and indicating pressure gauge.

NOTE: All stainless steel versions of L1100, L1200, L1200N, L1200NDVO, and

L1200NDVOR series carry Canadian Registration Number OF1476.2.

Series DVU150, DVU175, DVU2105/2115/2120 Dump Valves receive a

pneumatic input signal to cause an orifice to open or close allowing liquid

condensate to be drained from a pressure vessel. A pop up button indicates valve

open/closed. Stainless steel versions available.

L1100

L1111

L1200

L1200N L1200NDVO L1200NDVOR

Pressure Rating

• 15 psi (103 kPa) [1.03 bar] Polyethylene Float

• 1500 psi (10.3 MPa) [103.42 bar] Stainless Float ✗✗✗✗ ✗ ✗

• 2000 psi (13.8 MPa) [138 bar] BUOYGLAS™ Float ✗✗✗✗ ✗ ✗

Temperature Rating

• Standard: -20/175°F (-29/79°C)

• Standard: -20/300°F (-29/149°C)

✗✗✗✗ ✗ ✗

• Optional: -20/400°F (-29/204°C)

✗✗✗✗✗

Specific Gravity

• Standard: 0.5 with BUOYGLAS™ float ✗✗✗✗ ✗ ✗

• Optional: 0.65 with 304 Stainless Steel

†

✗✗✗✗✗

• Standard 0.73 Polyethylene Float

Electrical

• Standard SPDT: 5 A @ 125/480 VAC (see p. 3 for full ratings)

✗✗ ✗

•

Optional DPDT: 10 A @ 250 VAC (see p. 3 for full ratings)

✗✗ ✗

Valve: Two-way snap-action vent type

• 1/8 in. (3 mm) orifice w/Viton “A” seat

• 1/8 NPT inlet; 1/4 NPT vent ✗✗ ✗

• 30-70 psi (207-483 kPa) [2.07-4.83 bar] operating pressure

Dump Valve Operator: Operates Murphy DV Series

✗✗

dump valves or similar. 1/8 NPT inlet, outlet & vent.

Pressure Regulator/Filter and Murphy 20BPG:

0-75 psi (0-517 kPa) [0-5.17 bar] pressure gauge. ✗

Maximum input 300 psi (2.07 MPa) [20.68 bar].

1/8 NPT in/out.

Operation:

H=For high level, L=For low level

HLHH H H

Wire: 18 AWG x 36 in. (1.0 mm

x 914 mm) ✗✗ ✗

O-Rings: Viton

✗

✗✗✗ ✗ ✗

=1-1/2 NPT

=2 NPT

†

Meets NACE standard MR-01-75 for direct exposure to H

S service.

Not available with DPDT snap-switch.

Body

• Standard: Electroless Nickel plated steel ✗

✗

• Optional: 316 Stainless Steel

†

✗

Specifications

DISCONTINUED

Summary of content (6 pages)

PAGE 1
00-02-0175 Revised 03-06 Section 15 Installation for L1100, L1200, L1200N Series Liquid Level Switches and DVU150, DVU175, and DVU2105/2115/2120 Series Dump Valves. Please read the following instructions before installing. A visual inspection for damage during shipping is recommended before mounting.
PAGE 2
DIMENSIONS L1200N, L1200NDVO and L1200NDVOR with Dump Valve Operator, Pressure Regulator and Gage L1100 and L1200 11 in. (279 mm) Pressure Regulator with 20BPG Pressure Gage 3-1/2 in. (89 mm) 2-3/16 in. (56 mm) New Dump Valve Operator Assembly p/n 15010216 See Note 2 1/2 NPT See Note 1 3-5/8 in.
PAGE 3
REPLACING AND INSTALLING THE DVOA ASSEMBLY When replacing/installing the old style DVO assembly with the new style (DVOA), tubing and fitting modifications are required. We suggest removing the L1200NDVO/DVOR from the vessel. Relieve pressure from the vessel or use block valves before removing the L1200NDVO/DVOR. Replacing and Installing the DVOA Assembly For Models L1200NDVO & L1200NDVOR NOTE: Clean, dry instrument quality gas should be used. Use of filters will improve service life and reliability.
PAGE 4
PRESSURE VESSEL INSTALLATION: L1100, L1200, and L1200N Direct Installation into the Wall of the Pressure Vessel 1. Determine that the float travel is not obstructed by the coupling in Tank the vessel wall, internal Wall baffles, etc. Do NOT use more than one arm extension P/N 15050395. Explosion proof 2. BE SURE that the float Level conduit seal Switch and extension are tight where required. and that the lock washer is in place. 3.
PAGE 5
TYPICAL INSTALLATION ON GAS COMPRESSORS Basic Operation As condensate rises in the scrubber, the float on the L1200NDVOR rises and trips its pneumatic valve. The valve opens allowing pressure to enter the dump valve pilot chamber. Once the pressure enters the pilot chamber it forces the diaphragm and valve stem forward thus opening the valve seat (valve open/closed indicator button pops out) and releasing condensate through the valve stem and out the drain.
PAGE 6
ACCESSORIES Order by part number designation. 55050617: DVU150/DVU175 Adapter Bushing 15050375: Weld Collar Material: 2-1/2 Hex bar stock C.R.S 2-1/16 in (52 mm) 1-1/16 in (27 mm) 2 NPT 2-1/2 in (64 mm) 2-7/8 in (73 mm) 3-5/8 in. (92 mm) 1 NPT 4-1/2 in (114 mm) Operating Pressure: 2000 psi (13.8 MPa) [138 bar]. Operating Temperature: 400°F (204°C). 2 NPT 15051098: External Float Chamber 3 in. (76 mm) 1-11.5 NPT (2 places) DIS CO NT INU ED 2-11.5 NPT 10.5 in. (266 mm) 3 in.