Murphy LLS 사용자 설명서

LLS-93096N

Effective 03-94

Section 05

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.

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.

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).

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.

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LLS Series Pressure Switch

100–1750  689 kPa–12 MPa

15–100  103 kPa–689 kPa

2500 

17.2

200–2500

13.8 MPa–17.2 MPa

20–150  137 kPa–1.03 MPa

3000 

20.6

400–4000  2.8 MPa–27.5 MPa

75–450  517 kPa–3.1 MPa

5000 

34.4

100–1750  689 kPa–12 MPa

15–100  103 kPa–689 kPa

2500 

17.2

200–2500  13.8 MPa–17.2 MPa

20–150  137 kPa–1.03 MPa

3000 

20.6

400–4000  2.8 MPa–27.5 MPa

75–450  517 kPa–3.1 MPa

5000 

34.4

CRS steel sensor –chromate plated (yellow) 
Ni-SPAN

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diaphragm.

Thick wall 304 stainless steel sensor housing; 
Ni-SPAN

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diaphragm. Meets NACE MR-01-75

standard for direct exposure to H

2

S.

100–1750  689 kPa–12 MPa

15–100  103 kPa–689 kPa

2500 

17.2

100–1750  689 kPa–12 MPa

15–100  103 kPa–689 kPa

2500 

17.2

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

Remote sensor–Nickel plated steel w/ stainless
steel capillary; Teflon* coated diaphragm.  

200–2500  13.8 MPa–17.2 MPa

20–150  137 kPa–1.03 MPa

5000 

34.4

400–4000  2.8 MPa–27.5 MPa

75–450  517 kPa–3.1 MPa

5000 

34.4

Remote sensor–AISI 316 stainless steel housing;
stainless steel capillary and armor; AISI 316L
stainless steel Teflon* coated diaphragm. 

* Teflon–DuPont Trademark

50–450 

345 kPa–3.1 MPa

5–45 

34 kPa–310 kPa

1500 

10.3

50–450 

345 kPa–3.1 MPa

5–45 

34 kPa–310 kPa

1500 

10.3

50–450 

345 kPa–3.1 MPa

5–45 

34 kPa–310 kPa

1500 

10.3