Flomatic 89598PO Installation Manual

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Page 1

UNLEADED BACKFLOW PREVENTERS

OPERATION & MAINTENANCE MANUAL

LEAD

High Quality Valves Built to Last...

Page 2

Table of Contents

Features and Operating Procedures.....1

Specification Sheet RPZE 1/2" - 2".....2

Installation Guidelines & Procedures.....3

Trouble Shooting Procedures & Guide.....4

Trouble Shooting Solutions.....5

General Service Procedures RPZE/DCVE.....6

Check Valve Service Procedures.....7

Relief Valve Service Procedures.....8

Pressure Vacuum Breaker Service Instructions.....9

Repair Kits for PVB.....10

Repair Kits for RPZE & DCVE.....11

How to Contact & Warranty.....12

Page 3

OPERATING AND MAINTENANCE PROCEDURES

Reduced Pressure Backflow Preventer

Flomatic has a consistent backflow design that ranges from 1/2"-10", (15mm-250mm). The Flomatic Model RPZE II design is a more compact/economical model and is used when space is limited. The Flomatic Model RPZE is available in size 3/4"-2", (19mm-50mm) with a unleaded bronze body and cover as standard. The 2 1/2"-10", (64mm-250mm) are manufactured with epoxy coated ductile iron for strength.

The Flomatic backflow preventer includes tightly closing resilient seated shut-off valves on each end of the body. The assembly has two independent and internally loaded check valves with a pressure differential relief valve between them.

The pressure drop across the first check valve is approximately 6.0 PSID (41 kPa). The relief valve consists of a hydraulically balanced diaphragm. The high-pressure side of the first check valve is connected to the top of the diaphragm through an access hole in the body of the casting. The low-pressure side is connected to the reduced pressure zone keeping the relief valve closed during normal operation. This is spring loaded to force the relief valve open when the pressure drop across the first check reduces to approximately 2.5 PSID (17 kPa).

NORMAL FLOW CONDITION

High Quality Valves Built to Last...

Flow Direction

LEGEND

Inlet Pressure

Outlet Pressure

Intermediate Zone Pressure

Page 4

SPECIFICATION SHEET RPZE (1/2"-2") (12mm-50mm)

Features

•Unleaded body, test cocks and ball valves

•Ultimate mechanical protection of potable water, against hazards of cross connection contamination.

•Meets all specifications of

AWWA,ASSE and USC Foundation for Cross Connection Control and Hydraulic Research.

•Non-Interchangeable check valve assembly

•Replaceable check valve and removable 316 stainless steel relief valve seats

•Top entry single access cover

•Vertical test cocks

•Low Head loss

•Simple construction, fewer parts

Operation

The backflow preventer shall be a Reduced Pressure Principle and shall include a tightly closing resilient seated shut-off valve on each end of the body. The assembly shall be fitted with four (4) properly located resilient seated test cocks.

The assembly shall have two (2) independent and internally loaded check valve with a pressure differential relief valve located between the check valves.

The backflow preventer shall meet the requirements of the following standards:USC’s FCCC& Hr Manual,

Sec. 10, ASSE 1013 and CSA B64.4. Australia & New Zealand AS/NZS 2845-1

FLOMATIC SPECIFICATIONS

The Reduced Pressure Principle backflow preventer shall protect against backflow by either backpressure or backsiphonage from a cross-connection between potable water systems and substances that are considered to have health hazards.

It shall consist of two (2) mechanically independent, spring loaded, center guided check valves. It shall also have a hydraulically dependent differential pressure relief valve, set in an integral cast unleaded bronze body, with a single access cover. The assembly shall have four (4) vertical test cocks and two shut off valves which are quarter-turn, full-port, resilient seated and ball type.

The seat of each check valve and the relief valve shall be replaceable. The check valves shall be held into place by stainless steel clips and the check valve assemblies shall be non-interchangeable with silicone discs.

The backflow preventer shall be suitable for supply

pressure up to 175 psi (1205kPa) and water temperatures from 33 to 180 F.

Page 5

INSTALLATION GUIDELINES & PROCEDURES

Proper installation of the assembly is essential to the correct function of the assembly.

The following instructions are important characteristics of a proper installation.

1. Before installing any of Flomatic's backflow

assemblies, flush the lines thoroughly to remove all debris, chips and other foreign objects. Failure to do so may make any of these assemblies inoperable.

2. Allow sufficient clearance around the installed assembly to conduct testing (minimum 18" (450mm) around). The assembly should be installed in a horizontal position with a minimal clearance of 12" (300mm) between the relief valve discharge port and the flood level. The maximum height should be 30" (762mm) to allow for testing at a reasonable height.

3. Flomatic's RPZE assemblies are approved by

national approval agencies and are to be installed in a horizontal position. Approval agencies do not recommend installation of a RPZE in a pit. Flooding of the pit can result in a cross connection contamination. If local codes permit installation of a RPZE in a pit, adequate drainage must be provided to prevent the pit from flooding.

4. Placement of the assembly should be planned

where water discharge from the relief valve will not be objectionable or cause property damage.

5. Insure that the water supply pressure does not

exceed the manufacturer’s maximum water pressure or temperature. The unit should also be protected against thermal water expansion, extreme backpressure and/or water hammer.

6. The most common cause of field problems for RPZE’s is dirt or debris in the system. At the time of installation dirt or debris will become trapped in the first check seating area, resulting in a continuous discharge from the relief valve in a static or backflow condition.

THEREFORE THE SYSTEM SHOULD ALWAYS BE FLUSHED BEFORE THE ASSEMBLY IS INSTALLED.

7. To effectively flush the systems after the assembly has been installed, remove the internal components and open the inlet shutoff valve to flush all debris from the line and assembly. If debris in the water continues to cause problems, a strainer should be installed upstream of the assembly.

Page 6

TROUBLE SHOOTING GUIDE

Reduced Pressure Backflow Preventers

With Differential Pressure Gauge

SYMPTOM NO. 1:

Check Differential Across No. 1 Check Valve

READING PROBLEM

2 to 3 PSID Leak in No. 1

14 to 21 kPa

6 to 8 PSID and steady Malfunctioning

41 to 55 kPa

2 to 7 PSID fluctuating Inlet pressure fluctuating

14 to 21 kPa

or No. 2 check valve

pressure relief valve

Without Differential Pressure Gauge

SYMPTOM NO. 1 and No. 2:

A.) Close Ball Valve No. 2

RESULT PROBLEM

If discharge stops Leak in No. 2

check valve

If discharge does not stop Go to

B) Open No. 4 testcock to produce a flow graeter

Than differential relief valve discharge

RESULT PROBLEM

"B"

Static Pressure Condition

800-833-2040 • 518-761-9797 • Fax 518-761-9798 www.flomatic.com e-mail: [email protected]

If discharge stops Leak in No. 1

check valve

If discharge does not stop Malfunctioning

pressure relief valve

Page 7

TROUBLE SHOOTING GUIDE

Reduced Pressure Backflow Preventers

PROBLEM

1. Valve releases water on and off from the relief valve

2. Valve releases water constantly from the relief valve.

CAUSE SOLUTION

1a. Inlet pressure fluctuations

1b. Outlet pressure fluctuations

2a. Dirt or debris is on the first check.

2b. Damaged or dirty relief valve seat

2c. Relief valve piston "O" ring not free to move to scale, dirt or buildup of mineral deposits.

1a. Install a soft seated, spring loaded check valve on the inlet side of the assembly. (Flomatic model 80E)

1b. Install a soft seated, spring-loaded check valve on the outlet side of the assembly as close as possible to the shutoff valve. (Flomatic model 80E)

2a. Flush valve, If flushing does not work then clean or replace the first check.

2b. Clean or replace the relief valve seat.

2c. Clean, grease or replace the piston "O" ring.

3. Valve exhibits high-pressure Drop

4. No water flows downstream of valve

5. No water flows downstream of valve

6. Valve quickly and repeatedly fouls following servicing.

2d. Excessive backpressure,freezing, or water hammer has distorted the second check.

2e. Valve improperly reassembled.

3a. Fouled strainer.

3b. Valve too small for flow.

4. Valve installed backwards

5a. Follow Flomatic’s test procedure.

5b. Leaky downstream gate valve.

6a. Debris in pipeline is to fine to be trapped by strainer.

2d. Eliminate source of excessive backpressure or water hammer in the system downstream of the device. Use Flomatic Model 80E to dampen out backpressure. In case of freezing; thaw, disassemble, and inspect internal components. Replace as necessary.

2e. Install check springs in their proper location

3a. Clean strainer or replace.

3b. Install proper size device based on flow requirements

4a. Install valve in accordance with flow direction arrow

5a, 5b. Clean or replace gate valve with full port ball valves or resilient wedge shutoff valves.

6a. Install a finer mesh strainer element in the strainer.

Page 8

GENERAL SERVICE PROCEDURES RPZE/DCVE

Flomatic backflow preventers can be serviced in the field with common household tools. All assemblies have a

consistent design with all parts being located in the same locations and valves serviced in the same way.

1. First closed inlet and outlet shut-off valves and bleed any pressure by opening the #4 testcock, then the #3 and #2.

2. Next use a wrench or socket to take the bolts out of top cover. After taking the cover off carefully inspect diaphragms, seals and seating surfaces for debris or damage. (RPZE Fig. 1 DCVE Fig.1a)

Figure 1

Figure 1a

Figure 2a

5. Next use a medium straight blade screw driver to carefully pry the check valve out.

6. After check valve is out of the body, check for any build up of calcium or other mineral deposits. If this condition exits, then carefully remove any build-up with a straight blade screw driver. Also check the O-ring on the check valve for any cuts if it is cut or has any deposits remove and replace or clean.

7. When check valve is out of the body grasp check valve disc holder and use a wrench or socket to unscrew the check valve stem from the disc holder. (Figure 3).

Figure 3

3. After taking the cover off either check valve can be removed by simply using pliers to grasp the spring clip (RPZE figure 2, DCVE figure 2a).

4. Refer to parts list and figures for detailed parts. Do not use any petroleum based oils, grease, solvent or pipe dope on any of the parts unless instructed to do so. Use only lubricants that comply with FDA PORTABLE WATER requirements for use in drinkable water systems or lubricants supplied by the manufacturer.

Figure 2

8. When check valve is disassembled, inspect the check valve seat for any cuts along the seat ring diameter. If seat is cut, it is a sign of high back pressure from thermal water expansion, water hammer or other causes of excessive water hammer. If seat is cut or damaged, it should be replaced, or turn used disc over if new seat disc is not available.

Page 9

SERVICE PROCEDURES FOR RPZE/DCVE CHECK VALVE

Necessary components

• Adjustable Wrench • Pliers • Flat head screw driver • Socket wrench set • Loctite 242 (blue)

Visually inspect the rubber discs, springs and bolts for defects

If check valve disc is damaged then call a service center or factory for a rubber kit. If the check valve seat ring or spring is damaged call for a complete replacement check valve.

SUB-ASSEMBLIES: 1ST AND 2ND CHECK VALVES

1. Place check valve disc into check valve disc holder then place check valve disc retainer washer (with shiny side down and dull side up) over the check valve disc.

2. Place the 1st or 2nd check valve seat ring on top of the disc retainer and place O-ring around the slot in the seat ring. Then align these items with threaded hole in check valve disc holder.

3. Apply Loctite on the threads of the check valve disc holder.

4. Slide the spring down the shaft of the 1st or 2nd check valve seat ring. (Use heavy spring for 1st

check in RPZE units)

5. Thread the check valve stem through the assembly and tighten the stem into threads on the check valve disc holder.

NOTE: RPZE and DCVE check valve assemblies are identical with the exception of the 1st check valve spring.

ITEM DESCRIPTION

1 C.V. STEM 2 C.V. SPRING 3 2nd C.V. SEAT RING 4 C.V. O-RING 5 C.V. DISC REAINER 6 C.V DISC 7 C.V. DISCHOLDER

Page 10

SERVICE PROCEDURES FOR RPZE RELIEF VALVE

Necessary components • Adjustable Wrench • Pliers • Flat head screw driver • Socket wrench set-Loctite 242 (blue) Relief Valve Assembly

1. After removing the cover of the backflow preventer then remove the relief valve assembly from body. Inspect the assembly for debris or damage.

2. Grasp the bottom disc retainer and use a Allen wrench to take the assembly apart. Turn the Allen wrench counter clockwise until the assembly is apart. (figure 1)

Figure 1

3. If the relief valve disc/rubber has dirt or debris on it, rinse in clean water. If the disc/rubber is cut or damage beyond repair, contact service center or factory and request a rubber kit for the relief valve assembly.

Figure 2

4. Put relief valve diaphragm plate down the stem then place relief valve diaphragm on top of plate and screw piston onto stem.

ITEM DESCRIPTION

5. Put the O-ring onto the relief valve piston.

6. Then place relief valve disc holder on the bottom of the shaft and put the relief valve disc/rubber into disc holder, then screw relief valve retainer on to threads.

1 PISTON O'RING 2 R.V. PISTON 3 R.V. STEM O-RING 4 R.V. DIAPHRAGM 5 R.V. DIAPHRAGM PLATE 6 R.V. STEM 7 R.V. DISCHOLDER 8 R.V. DISC 9 R.V. DISC RETAINER 10 R.V. SPRING

RELIEF VALVE ASS'Y

RPZE/DCVE BACKFLOW REASSEMBLY

Visually inspect the valve body, springs and bolts for defects. Carefully remove any debris or foreign material with a flat head screwdriver.

Directions for assembly

1. Put lubricant on the 1st and 2nd check valve O-rings.

2. Put the 1st check valve into the body and secure with clamp.

3. Do the same for the 2nd check valve.

4. Lubricate relief valve O-ring with Silicone Lubricant.

5. For the RPZE UNITS Lubricate the relief valve seat into body and put spring over the seat then a-line relief valve assembly with hole in seat and the holes in the diaphragm.

6. Place the RPZE/DCVE cover over the body and secure with bolts (on the RPZE units the 2 small slits on the diaphragm should face the inlet side).

Page 11

GENERAL SERVICE INSTRUCTIONS

PRESSURE VACUUM BREAKER 3/4"-1" (20mm - 25mm)

1. Removal of bonnet/poppet

a. Close outlet ball valve then close inlet ball valve.

Bleed residual pressure by opening No. 2 testcock.

Figure 1

b. Remove canopy screws and canopy.

c. Unscrew bonnet assembly from valve body by hand

(If necessary, use appropriate size wrench on the outside diameter of bonnet).

d. Remove poppet/seal for any cracks or debris if it

is dirty then clean with warm water.

2. Removal of check valve

a. After removing the bonnet/poppet inspect the check

valve.

b. Use a 12 point 1-3/8" socket to unscrew check valve

out from the body (see figure 2)

c. Clean and inspect all components thoroughly prior

to reassemble.

d. Vent and check valve discs are reversible.

e. Use flat head screw driver to disassemble the

check valve (see figure 3)

Figure 2

Figure 3

Page 12

PRESSURE VACUUM BREAKERS REPAIR SERVICE KITS

PVB Check Valve Assembly - For Models B9500 & B9501

Kit Model Number: 89598PO

Kit Parts Part Description Part Materials

9259200 Check Valve Disc Holder GFC BASF#GC25A 9759300 Check Valve Disc Silicone Rubber 9259400 Check Valve Seat Ring Noryl GFN2 - 780s 9782900 Check Valve Seat O’Ring Buna - N 9659600 Check Valve Spring 302 Stainless Steel 9359700 Check Valve Spring Retainer Bronze B140-83 8474 #8-32 x 1/2 RHSTCS 18-8 Stainless Steel

PVB Air Vent Assembly - For Models B9500 & B9501

Kit Model Number: 89599PO

Kit Parts Part Description Part Materials

925860 Vent Canopy ABS 9258700 Bonnet Noryl GFN2 - 780s 9758800 Bonnet O’Ring Buna - N 9658900 Vent Spring 302 Stainless Steel 9759000 Vent Disc Silicone Rubber 9259100 Vent Disc Holder Polythylene 8473 Screws, 6-32x3/8 18-8 Stainless Steel

PVB Check Valve Assembly - For Models B9500 & B9501

Kit Model Number: B95RKOO

Kit Parts Part Description Part Materials

9758800 Bonnet O’Ring Buna - N 9782900 Check Valve Seat O’Ring Buna - N 9759000 Vent Disc Silicone Rubber 9759300 Check Valve Disc Silicone Rubber

Page 13

LEAD

Relief Valve Assembly

Check Valve Assembly

ITEM # QTYDESCRIPTION RPZE II

BODY

Check Valve Assembly

1/2'' & 3/4''

B9399E / B9300E

8382E9, E20

B9200E / B9201E

BACKFLOW

PREVENTERS...

Better By Design

Air Gap Standard*

Silicone Discs

Top Entry Single Access Cover

Relief Valve Will Not Spray

Vertical Test Cocks

*Up to 2"

RPZE RPZE RPZE II RPZE

3/4'' & 1''

83820E0, 1E1

1-1/4''

B9202E

83820E2

1-1/2''

B9303E

83820E3

B9203E / B9204E

1-1/2'' & 2''

83810E3, OE4

RV DIAPHRAGM / DIAPHRAGM PLATE

RELIEF VALVE DISC RETAINER

1ST & 2ND CV DISC HOLDER

1ST & 2ND CV SPRING CLIP

COVER

TESTCOCK

RELIEF VALVE PISTON

RELIEF VALVE O-RING

RV STEM / STEM O-RING

RV DISC / DISC HOLDER

1ST & 2ND CV STEM

1ST CV SPRING

1ST & 2ND CV O-RING

1ST CV SEAT RING

1ST & 2ND CV WASHER

1ST & 2ND CV DISC

2ND CV SEAT RING

83822E9

9383395E

9283299

9783899

9783999

9283499

9783699

9283599

9382499

9682899

9872999

9282399

9682799

9782699

9382599

9684299

9283099

83822E0

9383395E

9283200

9783800

9783900

9283400

9783600

9283500

9382400

9682800

9782900

9282300

9603201

9782600

9382500

9684200

9283000

83822E2

9383397E

9283202

9783802

9783902 / 9686202

8383402 / 9785602

9783602 / 9286102

9283502

9382402

9682802

9782900

9282300

9603201

9782600

9382500

9684200

9283000

83822E3

9383397E

9283202

9783802

97839A3 / 9686202

83834A3 / 9785602

9783602 / 9286102

9283502

83824A3

96828A3

97829A3

92823A3

96032A3

97826A3

83825A3

96842A3

92830A3

83812E3

9383397E

9283203

9783803

9783903 / 9686203

8383403 / 9783803

9783603 / 9286103

9283503

8382403

9682803

9782903

9282303

9682703

9782603

83825E3

9684203

9283003

2ND CV SPRING

RV SPRING

RV SEAT

RV SEAT O-RING

COVER BOLTS

9683199

9683799

9684099

9784199

8296

9683100

9683700

9684000

9784100

8446

9683102

9683702

8684002

9784102

8446

96831A3

96837A3

8684002

9784102

8449 (USES 6)

9683103

9683703

8684003

9784103

8449 (USES 6)

Page 14

Repair Kits

Model RPZE & RPZE II

Size Relief

1/2" & 3/4"

RPZE II

(4, 5, 6, 7, 8, 9, 20, 21, 22)

3/4" & 1"

(4, 5, 6, 7, 8, 9, 20, 21, 22)

1 1/2" & 2"

2 1/2" & 3"

(4, 5, 6, 7, 8, 9, 20, 21, 22)

Complete

89880P9

89850P0

89850P3

89850P5

89850P7

89850P9

89850P10

1st Check 2nd Check Rubber Kit

89878P9

(10, 11, 12, 13, 14, 15, 16, 17)

89848P0

(10, 11, 12, 13, 14, 15, 16, 17)

89848P3

(10, 11, 12, 13, 14, 15, 16, 17)

89848P5

(10, 11, 12, 13, 14, 15, 16, 17)

89848P7

(10, 11, 12, 13, 14, 15, 16, 17)

89848P9

(10, 11, 12, 13, 14, 15, 16, 17)

89848P10

(10, 11, 12, 13, 14, 15, 16, 17)

89879P9

(10, 12, 14, 15, 16, 17, 18, 19)

89849P0

(10, 12, 14, 15, 16, 17, 18, 19)

89849P3

(10, 12, 14, 15, 16, 17, 18, 19)

89849P5

(10, 12, 14, 15, 16, 17, 18, 19)

89879P7

(10, 12, 14, 15, 16, 17, 18, 19)

89879P9

(10, 12, 14, 15, 16, 17, 18, 19)

89879P10

(10, 12, 14, 15, 16, 17, 18, 19)

(5, 6, 8, 12, 15, 22)

B93RK99

B92RK00

B92RK03

B92RK05

B92RK07

B92RK09

B92RK10

Model DCVE

Size 1st Check 2nd Check Rubber Kit

3/4" & 1"

1 1/2" & 2"

2 1/2" & 3"

89855P0

89855P3

89855P5

89855P7

89855P9

89855P10

89849P0 B91RK00

89849P3 B91RK03

89849P5 B91RK05

89849P7 B91RK07

89849P9 B91RK09

89849P10 B91RK10

Page 15

8 WAYS YOU CAN REACH US...

1. ORDER DESK 800-833-2040 Ext. 2 We love to help with new orders and inquiries.

2. TECH SUPPORT 800-833-2040 Ext. 4 Our engineers are on stand-by for application/product support.

3. SALES & MARKETING 518-761-9797 Ext. 3 Use this line & ext. 3 to reach the sales & marketing group.

4. FAX ORDERS 800-314-3155 The fastest and easiest way is to fax us orders and inquiries. 518-761-9798

5. PHONE 518-761-9797 If you are out of the country or can’t get through, try this line.

6. WEB SITE www.flomatic.com This page will help you get the latest information on Flomatic.

7. E-mail [email protected] This is a quick and easy way to send us a message and communicate with us.

8. U.S. Mail 15 Pruyn’s Island Drive Put it in an envelope and lick a stamp, it’s that easy. Glens Falls, NY 12801-4424

Danfoss Flomatic Conditions of Sale TERMS OF SALE

PRICE

Prices at date of shipment will apply. Prices are subject to change without notice.

ACCEPTANCE

Orders are accepted subject to approval of credit. Delivery is subject to strikes, accidents, or other causes beyond our control.

ERRORS, SHORTAGES, ETC.

All claims for errors, shortages, etc. must be made within 10 days of delivery.

CANCELLATIONS OF ORDERS

Orders for standard catalog products may be cancelled only if notice is received prior to the date of shipment.

RETURNS

Merchandise in new and saleable condition may be returned within one year after purchase on a freight prepaid basis for credit upon return authorization approval number, subject to inspection and acceptance at our plant. A 25% restocking charge and original freight allowance, if any, will be deducted from the credit. Special order products are nonreturnable, or at manufacturer’s option.

MINIMUM NET CHARGE TERMS FREIGHT

$50.00 1% ten days, net 30 F.O.B Factory

WARRANTIES

LIMITED ONE-YEAR WARRANTY (Complete Product Line)

Flomatic Corporation warrants that its products are free from defects in materials and workmanship. Flomatic will replace any valve covered by this warranty that is found to be defective within one year, unless otherwise stated below, from the time of sale. This warranty will be void if the product has been modified in any way by the purchaser, or is subjected to unreasonable use.

LIMITED THREE-YEAR WARRANTY (Backflow Valves)

Flomatic Corporation warrants that its BACKFLOW PREVENTERS are free from defects in materials and workmanship. Flomatic will replace or repair any BACKFLOW PREVENTER: , covered by this warranty that is found to be defective within three years from time of sale. This warranty will be void if the product has been modified in any way by the purchaser, or is subjected to unreasonable use.

LIMITED 5-YEAR WARRANTY (Enviro-Check®and Enviro Foot Valves)

Danfoss Flomatic Corporation warrants that its ENVIRO-CHECK AND FOOT VALVES, in all sizes up to 4”, are free from defects in materials and workmanship.

Danfoss Flomatic will replace, upon return authorization approval number, any ENVIRO-CHECK OR ENVIRO FOOT VALVE covered by this warranty that is found to be defective within five years from the time of sale. This warranty will be void if

the product has been modified in any way by the purchaser, or is subjected to unreasonable use. These limited warranties extend to the original purchase

from Flomatic only; they do not extend to any other purchaser or transferee.

EXCLUSION OF WARRANTIES

Flomatic Corporation makes no warranties, expressed or implied, with respect to its valves, other than the expressed limited warranties described herein. The implied warranties of merchantability and fitness for a particular purpose are hereby disclaimed by Flomatic Corporation. There are no warranties that extend beyond the description on the face hereof.

WARNING-NOT DESIGNED, INTENDED OR PERMITTED IN NUCLEAR FACILITY APPLICATIONS. FLOMATIC VALVES ARE NOT DESIGNED OR ENGINEERED FOR USE IN ANY NUCLEAR FACILITY OR IN CONJUNCTION WITH ANY NUCLEAR FACILITY OR SUPPORT FACILITY. USE OF ANY OF FLOMATIC’S PRODUCTS IN ANY SUCH APPLICATION IS A MISUSE OF THESE PRODUCTS AND VOIDS ALL WARRANTIES CONTAINED HEREIN, EXPRESSED AND IMPLIED, OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE.

EXCLUSION OF INCIDENTAL AND CONSEQUENTIAL DAMAGES

In no event shall Flomatic Corporation be liable for incidental or consequential damages, including but without limitation, damages of personal injuries resulting from the negligence of Flomatic Corporation, which may arise from the manufacture, sale, purchase and /or use of Flomatic valves. It being intended that purchaser’s exclusive remedy is limited to replacement of defective products. Some states do not allow the exclusion or limitation of incidental or consequential damages, or limitation on how long an implied warranty lasts, so that the above limitations may not apply to you. Contact your distributor or Flomatic Corporation at address shown if you have any questions about the coverage of this warranty or service under this warranty. This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

NOTE: Danfoss Flomatic reserves the right the change and/or alter valve products without prior notice. Consult factory for valve specifications.

High Quality Valves Built to Last...

Page 16

SELECTION GUIDE

APPLICATION

Type of Model Back Back Continuous Low High Device Siphonage Pressure Pressure Hazard Hazard

Double Check DCVE Valve

Reduced RPZE & Pressure RPZE II Principle

Pressure Type PVB Vacuum Breaker

DEFINITION: Back Siphonage -A form of backflow due to a reduction in system pressure

resulting in a negative or sub-atmospheric pressure at a site in the water system.

Back-Pressure -Any increase of pressure in the downstream piping system

above the supply pressure which would cause or tend to cause a reversal of the normal direction of flow.

Continuous Pressure -Extended or prolonged pressure.

Low Hazard -An actual or potential threat to the physical properties of the

water system or the portability of consumer's water system, but which would not constitute a health or system hazard.

High Hazard -An actual or potential threat of contamination of a physical or

toxic nature to the consumer's water system that would be a danger to health.

15 Pryun’s Island Drive Glens Falls, N.Y. 12801-4424 800-833-2040 • 518-761-9797 • Fax 518-761-9798 www.flomatic.com e-mail: [email protected]

OMBF-REV - /0

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