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Section No. 2.12

W861

Series W861 Hermetically Sealed Level Control Application The Model W861 Hermetically Sealed Level Control is a side mounted float type liquid level control. This unit is used as a high or low level control. Also, can be used to sound alarms or operate control equipment.

Features • Corrosion Proof: All 316 Stainless Steel wetted parts. • Adjustments: Nothing to adjust or get out of calibration. • Hermetically Sealed Switch. • Replacement Switch Capsule: Can easily be changed in field. • Explosion Proof: CSA APPROVED Class I, Groups A, B, C & D, Class II Groups E, F, & G

Dimensional Data W861 Std. 1 1/2" NPT Or 2" NPT 8 1/2 1/2" NPT

Operation As the liquid in the vessel rises, lifting the float, a permanent magnet (weld sealed inside the arm) is moved downward toward the hermetically sealed reed switch inside the housing body causing magnetic actuation of the switch.

3"

W861 With External Cage 7 5/32

4" 1" NPT (TYP.)

Minimum Specific Gravity . . . . . . . . . . . . . . . . . . . . . . . 0.45 Operating Pressure Rating . . . . . . . . . . . . . . . . . . . . 1500 psig Float Material . . . . . . . . . . . . . . . . . . . . . 316 Stainless Steel Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250˚F Level Differential . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. 1" Electrical Connection . . . . . . . . . . . . . 1/2" Female Pipe Thread Switch Rating Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPST Voltage . . . . . . . . . . . . . . . . . . . . 120 VAC or 120 VDC Max. Current . . . . . . . . . . . . . . . . . . . . . . . . 3 Amp in RUSH Max. Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 VA Max.

Determining the Model Number Example given: Standard Model W861-S15 Float Control with, SPST Hermetically Sealed Switch, 1 1/2" NPT 316 S.S. Vessel Connection and 316 S.S. Float, Arm and Pivot for Internal Vessel Mounting with Pressure Up to 1500 psi.

MODEL W861-S 15 Connection S • Thread NPT F • Flange*

5 3/8

Specifications

Parts List Item

Description

1 BODY, ASTM A-276 TY.316 2 FLOAT, 316 STAINLESS STEEL 3 ARM, ASTM A-276 TY.316 4 PIVOT PIN, 316 STAINLESS STEEL 5 SPACER, 316 STAINLESS STEEL 6 SWITCH, SPST 7 FOAM SPACER 8 GROMMET, NEOPRENE 9* NAME PLATE *Not Shown

2

4

5

1 1 1 1 2 1 1 1 1

3

1

Size 15 • 11/2" 20 • 2"

*Specify size & ANSI Class when ordering.

The

Part No. 1 1/ 2" NPT 2" NPT 30112 30004 10321 10321 20367 20367 20368 20347 20369 20348 20350 20350 10555 10555 10322 10322 10320 10320

Qty.

6

7 8

Company, L.L.C. • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com

©2002 The WellMark Company • Litho USA • WMW861-11/02 • All registered trademarks are the property of their respective owners.

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861 Level Switch Specification, Order Code & Parts Manual  

Wellmark Company part lists, schematics, & bulletin. Brought to you courtesy of RMC Process Controls & Filtration, Inc. & www.RegulatorParts...

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