Murphy LLSRB Series specifications Description, Specifications, Sensor Model Selection Table

LLS, LLSB, LLSR, LLSRB Series Models

Lead Line Pressure Switches

Installation and Operation Instructions

LLS-93096N

Effective 03-94

Section 05

FRANK W.	®
	MFR.

Please read the following information before installing. A visual inspection of this product for damage during shipping is recommended before mounting. It is your responsibility to have a qualified person install the unit and make sure installation conforms to NEC and local codes.

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.

LLS Series Pressure Switch

Description

The LLS Series is a pressure switch for applications where viscous liquids could plug the sensing orifice. LLS and LLSB models have a 2 inch NPT male connection which attaches directly into the process line. LLSR and LLSRB models feature a remote sensor connected to the pressure switch by a length of stainless steel capillary and armor. The snap-acting switch is field adjustable. The switch is housed in a hard anodized aluminum enclosure.

Optional for LLSR and LLSRB models is a 1 inch NPT x 1 inch NPT (male) pulsation dampener to minimize damaging pressure pulsation to the switch.

Specifications

•Maximum Ambient Temperature: -10° to +160°F (-23° to +71°C).

•Maximum Process Temperature: -40° to +160°F (-40° to +71°C).

•Temperature Compensation: The volumetric expansion and contraction of the fill may cause a shift of ±3% to ±5% of the set point.

•Switch Enclosure: Aluminum hard anodized (black). NEMA 4, 4x. NEMA 7 and 9 explosion-proof, waterproof and corrosion resistant. Suitable for Class I, Div. 1, Groups A, B, C, D; Class II, Div. 2, Groups E, F, G.

•Sensor Body: LLS: CRS steel chromate plated; 2 in. NPT connection. LLSB: Thick wall 304 stainless steel sensor 2 in. NPT process connection. LLSR: Remote Sensor; Nickel plated steel, stainless steel capillary. LLSRB: Remote Sensor; 316 stainless steel housing and capillary.

•Diaphragm Materials:

LLS/LLSB: Ni-SPAN® . LLSR/LLSRB: 316L S. Steel–Teflon* coated.

•Snap-switch Ratings: SPDT (Std.): 15 A @ 125, 250 or 480 VAC SPDT (Gold): 100 mA @ 125 VAC; 0.250 A @ 6 VDC DPDT (Std.): 11 A @ 125 or 250 VAC

DPDT (Gold): 100 mA @ 125 VAC; 0.250 A @ 6 VDC

•Trip Point Adjustment: Field-adjusted with screwdriver.

•LLSR/LLSRB Mount: 4-hole bolt pattern; 1/4 in. (6 mm) dia. bolts.

•LLS/LLSB Mount: Direct mount into process (2 in. NPT connection).

•Shipping Weight: LLS/LLSB: 4 lbs. 9 oz. (2.25 kg).

LLSR/LLSRB: 7 lbs. 12 oz. (3.23 kg).

•Shipping Dimensions:LLS/LLSB: 10 x 9-1/4 x 5-3/4 in. (254 x 235 x 146 mm). LLSR/LLSRB: 15-3/4 x 11 x 5-1/4 in. (400 x 279 x 133 mm).

Sensor Model Selection Table

Base

Switch Adjustment Range

Dead Band Approximate

Max System

Wetted Parts Materials

Model

psi

kPa/MPa

psi

kPa/MPa

psi

MPa

50–450

345 kPa–3.1 MPa

5–45

34 kPa–310 kPa

1500

10.3

LLS

100–1750

689 kPa–12 MPa

15–100

103 kPa–689 kPa

2500

17.2

CRS steel sensor –chromate plated (yellow)

200–2500

13.8 MPa–17.2 MPa

20–150

137 kPa–1.03 MPa

3000

20.6

Ni-SPAN®diaphragm.

400–4000

2.8 MPa–27.5 MPa

75–450

517 kPa–3.1 MPa

5000

34.4

50–450

345 kPa–3.1 MPa

5–45

34 kPa–310 kPa

1500

10.3

Thick wall 304 stainless steel sensor housing;

LLSB

100–1750

689 kPa–12 MPa

15–100

103 kPa–689 kPa

2500

17.2

Ni-SPAN®diaphragm. Meets NACE MR-01-75

200–2500

13.8 MPa–17.2 MPa

20–150

137 kPa–1.03 MPa

3000

20.6

standard for direct exposure to H2S.

400–4000

2.8 MPa–27.5 MPa

75–450

517 kPa–3.1 MPa

5000

34.4

50–450

345 kPa–3.1 MPa

5–45

34 kPa–310 kPa

1500

10.3

LLSR

Remote sensor–Nickel plated steel w/stainless

100–1750

689 kPa–12 MPa

15–100

103 kPa–689 kPa

2500

17.2

steel capillary; Teflon* coated diaphragm.

200–2500

13.8 MPa–17.2 MPa

20–100

137 kPa–689 kPa

3000

20.6

50–450

345 kPa–3.1 MPa

5–45

34 kPa–310 kPa

1500

10.3

LLSRB

100–1750

689 kPa–12 MPa

15–100

103 kPa–689 kPa

2500

17.2

Remote sensor–AISI 316 stainless steel housing;

stainless steel capillary and armor; AISI 316L

200–2500

13.8 MPa–17.2 MPa

20–150

137 kPa–1.03 MPa

5000

34.4

stainless steel Teflon* coated diaphragm.

400–4000

2.8 MPa–27.5 MPa

75–450

517 kPa–3.1 MPa

5000

34.4

* Teflon–DuPont Trademark 1