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Optional

Xylan

Coating

17A

10 IOM-ACV-127-8_6127-8 2115

EDP# 1917065

IOM-ACV-127-8_6127-8 2115

EDP# 1917065

ACV Assembly Diagram – Series LFM127-8

Item

Description

Material

Pipe Plug

Lead Free Brass

Cover

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Cover Bearing

ASTM A276 304 Stainless Steel

Stud with Cover Nut and Washer

ASTM A570 Gr.33 Zinc Plated Steel

Body

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Spring

ASTM A276 302 Stainless Steel

Stem Nut

ASTM A276 304 Stainless Steel

Lock Washer

ASTM A276 304 Stainless Steel

Stem Washer

ASTM A276 304 Stainless Steel

Diaphragm Washer

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Diaphragm*

Buna-N (Nitrile)

Disc Retainer

ASTM A536 65-45-12 Epoxy Coated Ductile Iron

Seat Disc*

Buna-N (Nitrile)

Spacer Washer* x5

NY300 Fiber*

Disc Guide

ASTM A743 CF8M (316) Stainless Steel

Shaft

ASTM A276 304 Stainless Steel

Seat Ring**

ASTM A743 CF8M (316) Stainless Steel

17A

Seat Screw** (8" and Larger)

ASTM A276 304 Stainless Steel

Seat Gasket*

Buna-N (Nitrile)

* Contained in Main Valve Repair Kit

**Note: 6 inch and Smaller Valves, Seat Ring is threaded

Installation: If unit is installed in any orientation other than

horizontal (cover up) OR extreme space constraints exist,

consult customer service prior to or at the time of order.

NOTICE

Содержание LFM127-8

Страница 1: ...on 2 Setting the Altitude Controls 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica tions to the information provided You are required to consult the local building and plumbing codes prior to installation If the information provided here is not consistent with local building or plumbing codes ...

Страница 2: ...lowing instructions on Technical Bulletin Start up of an automatic control valve requires that proper procedures be followed Time must be allowed for the valve to react to adjustments and the system to stabilize The objective is to bring the valve into service in a controlled manner to protect the system from damaging over pressure installed sensing line and directs pressure into and out of the co...

Страница 3: ...wly open the valve See Figure 1 STEP 3 Pressure the line by opening the upstream isolation valve slowly Air is vented through the air bleed valve Tighten the fitting when liquid begins to vent See Figure 1 Repeat the process until no air is trapped in the system Globe Angle Size in 11 4 11 2 2 21 2 3 4 6 8 10 12 14 16 20 24 A in 16 16 20 22 22 24 32 34 38 44 48 52 56 56 B in 10 10 12 14 14 16 24 2...

Страница 4: ...r of the main valve If recovery of pressure is slow upon increased downstream demand turn the adjustment screw OUT counterclockwise increasing the rate of opening See Figure 2B If recovery of downstream pressure is too quick as indicated in a rapid increase in pressure possibly higher than the desired set point turn the adjustment screw IN clockwise decreasing the rate of opening See Figure 2A STE...

Страница 5: ...red setting STEP 10 Adjust the Sustaining Control screw IN clockwise until the inlet pressure begins to increase See Figure 4A or OUT counter clockwise See Figure 4B to decrease stopping at the desired pressure STEP 11 Allow pressure to stabilize STEP 12 Fine tune the sustaining setting as required as detailed in STEP 10 STEP 13 Open upstream isolation valve to return to normal operation IOM ACV 1...

Страница 6: ...e specification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace diaphragm or tighten disc diaphragm assembly Test 2 Seat Seal Test 1 Close downstream isolation valve and install pressure gauges on an open inlet and outlet port of main valve 2 Open upstream isolation valv...

Страница 7: ... 2 1 2 turns open from full closed position Can be adjusted in field Main Valve will not close Closed isolation valves in pilot system Check isolation valves ensure open Diaphragm is damaged Conduct diaphragm seal test repair and replace if necessary Main valve stem assembly corroded damaged Inspect stem assembly clean replace if necessary Blockage in main valve Perform freedom of movement test if...

Страница 8: ... Remove cover nuts and washers 3 Remove the cover If cover is not free to be removed loosen it by tapping upward along its outside edge with a dull cold chisel pic tured above a Large valves may require the installation of lifting eye bolts in order to facilitate cover removal installation ports are provided on the cover for this purpose 4 Remove the Disc and Diaphragm Assembly from the valve body...

Страница 9: ... brush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Inspect valve seat If seat is not damaged removal is not necessary Valve seats 6 and smaller are threaded into the body of the valve and require a seat removal tool Figure 6 Table 1 details the tool dimensions for seat removal Valve seats 8 and larger are held in the valve body with stainless steel c...

Страница 10: ... Nuts in a crossing pattern to ensure even distribution Test the Disc and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrity of the Seat Seal by following the Seat Seal Test procedure in previous section 12 Return valve to service by following instructions on the Technical Bulletin matching the valve function Size in 1...

Страница 11: ...l 9 Stem Washer ASTM A276 304 Stainless Steel 10 Diaphragm Washer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 11 Diaphragm Buna N Nitrile 12 Disc Retainer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 13 Seat Disc Buna N Nitrile 14 Spacer Washer x5 NY300 Fiber 15 Disc Guide ASTM A743 CF8M 316 Stainless Steel 16 Shaft ASTM A276 304 Stainless Steel 17 Seat Ring ASTM A743 CF8M 316 Stainless Steel 17A...

Страница 12: ...ot be responsible for any incidental special or consequential damages including without limitation lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly other costs resulting from labor charges delays vandalism negligence fouling caused by foreign material damage from adverse water conditions chemical or any other circumstances ov...

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Watts LFM127-8, Инструкция по установке, эксплуатации и обслуживанию

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