DETECTOR CHECK VALVES - 3 to 10 INCH (80 to 250 mm) HERSEY MODEL EDC IV - 175 PSI - Red Enamel Finish or Epoxy Coated

inlet x Outlet

Flange Flange Groove

Flatge G rtove Grcke

X I X I X

x I - I - X - Available

OPTIONAL BY PASS TRIM (SIZE AS SPECIFIED, TYPICAL ARRANGEMENT FOR 3/4” BY-PASS ON A 4” VALVE SHOWN)

CHECK VALVE

BALL VALVE

OPTIONAL WATER METER FOR BYPASS (SIZE AND MEASUREMENT UNITS AS SPECIFIED, 5/B”x 314” SHOWN)

FIGURE A MODEL EDC IV DETECTOR CHECK VALVE AND OPTIONAL BYPASS ACCESSORIES

The Model EDC IV Detector Check Valves (Ref. Figure A) are resilient rub- ber seat, spring loaded swing check Valves designed for installation in com- mercial fire lines to detect downstream leakage and unauthorized use of water which is intended for fire protection system service. The EDC IV Valves are designed for either horizontal or vertical (flow up) installation and they are available with inlet and outlet con- nections per Figure A.

The EDC IV, when equipped with an external metered bypass, diverts a small percentage of water flow through the bypass by virtue of the spring loaded clapper sealing the main water- way. With the clapper closed, low rates of flow are registered through the by- pass meter. The clapper remains closed and all water passes through the meter until the pressure loss through the bypass exceeds approxi- mately 2 psi (0,14 bar), at which point

the clapper opens to allow flow through the main waterway, as would be the case in the event of a fire.

Provision is made for installation of an optional bypass trim with a water meter having the size and units of measure- ment appropriate for the application. When the bypass trim or the bypass trim and meter are ordered, the EDC IV is shipped with the bypass assem- bled to the EDC IV. The bypass meter will register flows up to the rated capa- bility of the selected unit. Flow through the main waterway is not registered. Both the mainline check valve and the optional bypass check valve shut off flow in the reverse direction.

The spring mechanism of the EDC IV provides for low headloss during full flow conditions. All of the operating parts of the spring and clapper mech- anism are attached to the cover for easy removal and maintenance. For safety and by virtue of a novel spring mechanism design, full spring tension is applied only when the cover is com-

pletely bolted to the body. The spring tension is automatically and fully re- lieved as the cover bolts are loosened.

The 3 through 10 inch (80 through 250 mm) Model EDC IV Detector Check Valves are listed by Underwriters Lab- oratories Inc. and Underwriters’ Labo- ratories of Canada. They are also ap- proved by Factory Mutual Research Corporation. The listings and approv- als apply to both the red enamel exte- rior finish, as well as the internal/exter- nal epoxy coating.

WARNING The Model EDC IV Detector Check Valves described herein must be in- stalled and maintained in compliance with this document, as well as with the applicable standards of the Na- tional Fire Protection Association, in addition to the standards of any other authorities having jurisdiction. Fail-

TD340 Printed in U.S.A. 6-95

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i-G FLANGE x FLANGE

3 (80) 1 70 (32) I

6 (150) 1 167 (76) I

8 G’W 1 318 (145) I

OUTLET SIDE

1 4 (100) 1 67 (31) I

110(250)1 N/A I I I 1

SIDE OUTLET

h t--“I

I GROOVE x GROOVE I Size, I I NPS WI

LE:g;)

1 3 (80) 1 N/A I

1 I 1 SIDE OUTLET a

Dimensions in Inches and (mm)

G H” J” SIZE

VALVE, NPS VW

E A B C D

15.00 11.00 8.81 3.88 (381 ,O) (279,4) (223,8) (98,6) 15.00 11.00 8.81 4.62

F

2.56

E&L

l&l&

(913) 4.62

(117,3) 6.25

[158,8)

N/A

3..75

$g

(120,7) 5.94

u50,q

N/A

’ BASED ON A 5/8’ X 3/4’ (18 mm x 20 mm) METER BYPASS.

FIGURE B VALVE DIMENSIONS

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ure to do so may impair the integrity of these devices.

The owner is responsible for main- taining their fire protection system and devices in proper operating con- dition. The installing contractor or manufacturer should be contacted rel- ative to any questions.

The Model EDC IV Detector Check Valves are rated for use at a maximum service pressure of 175 psi (12,l bar) and an ambient temperature range of 40-F to 11 O’F (4-C to 43’C). Valve di- mensions are shown in Figure B. The EDC IV is available with either a “Stan- dard Order” external red enamel finish or a “Special Order” internal/external epoxy coating for the Body and Cover.

Flanged inlet and outlet connections (Ref. Figure B) are per ANSI Standard B16.1 (Class 125). The grooved inlet and outlet connections are cut in ac- cordance with Gruvlok standard groove specifications for steel pipe, and they are suitable for use with grooved end pipe couplings that are listed or approved for fire protection service.

The bypass ports are NPT threaded per ANSI 816.20.1, and the “Standard Order” tap sizes, as well as maximum available “Special Order” tap sizes, are as given in Figure B.

Also available on a “Special Order basis is the bypass trim or bypass trim with meter (Ref. Figure A), which are provided according to ordering specifi- cations.

The EDC IV may be installed horizon- tally or vertically (flow up). When in- stalled in the horizontal position, the handhole cover should face up for ease of maintenance. The nominal pressure loss versus flow curves for the 3 to 10 inch (80 to 250 mm) EDC IV Valves are shown in Figure C-l through C-5.

Components of the EDC IV are shown in Figure D. The Body is cast iron per ASTM Al26 (Class B), and the Seat Ring is brass per ASTM B584 (UNS C83600). The Cover is ductile iron per ASTM A536 (Grade 65-45-l 2) or cast iron per ASTM Al26 (Class B). The

I FLOW RATE IN LITRES PER MINUTE

0 500 1000 1500 2006 2580 3000

FLOW RATE IN U.S. GALLONS PER MINUTE

FIGURE C-l NOMINAL PRESSURE LOSS VERSUS FLOW

- 3 INCH (80 mm) EDC IV VALVE -

FLOW RATE IN LITRES PER MINUTE

0 500 1000 1500 2006 2500 3000

3.5 0,24 ‘“I o’24 w w g g 3.0 3.0 021 021 m z m z 8 8 z z 6 6 8 8 2 2 2.5 2.5 0,17 0,17 y B y B

ii ii 3 3

5 5 u) u) E E 3 3 J J 2.0 2.0 0,14 0,14 E E i i i i $ $ P P % %

1.5 1.5 0,lO 0,lO z z

,..I 007 0 loo 200 300 400 600 700 600'

FLOW RATE IN U.S. GALLONS PER MINUTE

FIGURE C-2

1 .o 0,07 0 loo 200 300 400 500 600 700 600 600

FLOW RATE IN U.S. GALLONS PER MINUTE

FIGURE C-2 NOMINAL PRESSURE LOSS VERSUS FLOW

- 4 INCH (100 mm) EDC IV VALVE - NOMINAL PRESSURE LOSS VERSUS FLOW

- 4 INCH (100 mm) EDC IV VALVE -

FLOW RATE IN LITRES PER MINUTE

0 1000 2006 3OW 4000 5000 6000 7600

3.5 0.24

iii f 3.0 021 m s 8 r B 8 E 2.5 0,17 B u 2 5 t: I E

2.0 \ / a J OS14 0

9 \l

a I z 8 %

1.5 0.10 2

1.0 0,07 0 2w 400 600 600 1000 1200 1400 1600 1600 2006

FLOW RATE IN U.S. GALLONS PER MINUTE

FIGURE C-3 NOMINAL PRESSURE LOSS VERSUS FLOW

- 8 INCH (150 mm) EDC IV VALVE -

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FLOW RATE IN LITRES PER MINUTE

4000 6000 6ooo loo00 12000

0.24

1.0 0 500 1060 1500 2000 0,07 2500 3000 3500

FLOW RATE IN U.S. GALLONS PER MINUTE

FIGURE C-4 NOMINAL PRESSURE LOSS VERSUS FLOW

- 8 INCH (200 mm) EDC IV VALVE -

FLOW RATE IN LITRES PER MINUTE

0 2000 4600 6600 6000 10000 12060 14060 16000 16006

3.5 0.24

1 .o 0 loo0 2000 3006 0,07 4000 5000

FLOW RATE IN US. GALLONS PER MINUTE

FIGURE C-5 NOMINAL PRESSURE LOSS VERSUS FLOW

- 10 INCH (250 mm) EDC IV VALVE -

O-ring used to seal the Cover is EPDM. The Cover Bolts are steel per ASTM A307 (Grade A), the Eye Bolt is forged steel with a zinc chromate fin- ish, the Vent Screw is Type 304 or 316 stainless steel, and the Vent Screw Seal is nylon.

The Spring Mechanism is fabricated of austenitic stainless springs, links, and pins. Spacers used for the Spring Mechanism are copper per ASTM 8302. The Spring Mechanism is bolted to the Cover with Type 18-8 stainless steel fasteners.

The EPDM encapsulated Clapper is steel per ASTM A569 for the 3 and 4 inch (80 and 100 mm) size Valves, steel per ASTM A285 for the 6 inch (150 mm) size Valves, and ductile iron per ASTM A536 for the 8 and 10 inch (200 and 250 mm) size Valves. The

Clapper has a Type 303 stainless steel threaded stud, as part of its subassem- bly. The Clapper Washer and Clapper Nut are Type 18-8 stainless steel.

The Model EDC IV Detector Check Valve is to be installed as follows:

1. The EDC IV may be installed hori- zontally or vertically (flow up). When installed in the horizontal position, the handhole cover should face up for ease of maintenance.

2. The flow arrow cast on the Cover, as well as on the Body, must be in the direction of water flow.

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3. Bypass arrangements and devices must conform to local water author- ity requirements.

4. Metered by-pass arrangements must be installed with the same di- rection of flow as the EDC IV.

5. After the installation is complete and the system has been pressurized with water, trapped air should be relieved from the under side of the Cover by loosening the Vent Screw (7 - Fig. D) approximately five turns. Do not remove the Screw from the Cover. Retighten the Vent Screw after water appears, indicating that all of the trapped air has been re- leased.

The Model EDC IV Detector Check Valve does not require any regularly scheduled maintenance; however, it is recommended that water be flowed through the main waterway at least annually to ensure that all internal parts move freely. If there are indica- tions that the Clapper is not moving freely, as evidenced by a partial water flow, or the EDC IV appears not to be shutting off reverse flow, then the EDC IV must be serviced.

It is recommended that automatic sprinkler systems be inspected quar- terly by a qualified Inspection Service.

NOTE Before closing a fire protection system main control valve for maintenance work on the fire protection systems which it controls, permission to shut down the affected fire protection sys- tems must first be obtained from the proper authorities and all personnel who may be affected by this decision musy be notified.

Service Procedure

1. Close the main control valve.

2. Prior to removing any Cover Bolts, the water pressure must be relieved and consideration should be given to the need for draining of the inlet and outlet piping. Verify that the drainage water is being properly disposed of and that it is not damaging property or constituting a hazardous condi- tion.

3. Remove the Cover Bolts as follows:

a. First, remove the Cover Bolt(s) located closest to the inlet end of the valve [i.e., one Bolt for the 3 and 4 inch (80 and 100 mm) valves and two Bolts for the 6,8, and 10 inch (150,200, and 250

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mm) valves]. Then, partially re- engage the removed Bolt(s) by two to three turns.

b. Slowly loosen and remove the remaining Cover Bolts. As the Cover Bolts are loosened and removed, the tension in the Spring Mechanism will be auto- matically relieved. The partially engaged Cover Bolt(s) located closest to the inlet end of the valve will prevent any lateral movement of the Cover as the other Bolts are removed.

c. Completely remove the Cover Bolt(s) located closest to the inlet end of the valve.

4. Lift the Cover & Clapper Mechanism Assembly clear of the Body.

5. Clean all interior parts and then in- spect for wear, damage, and free- dom of movement. Worn or dam- aged parts must be replaced. The Seat Ring is not replaceable. The Clapper can be replaced while the Spring Mechanism is assembled to the Cover.

When replacing a Clapper, be sure to securely re-tighten the Clapper Nut and Washer, which secures the Clapper to the Spring Mechanism. Likewise, when replacing a Spring Mechanism, be sure to securely tighten the Bolts holding the Spring Mechanism to the Cover.

6. Tighten (turning clockwise), as nec- essary, the Pre-tension Hex Bolt shown in Figure D for the 6 through 10 inch (150 through 250 mm) size valves. Normally, tightening of the Pre-tension Hex Bolt is only neces- sary when replacing the Spring Mechanism. The Pre-tension Hex Bolt is tightened until the spacer around the Bolt bottoms out against the blocks on both ends. Tightening of the Pre-tension Hex Bolt eases reassembling of the Cover & Clap- per Mechanism Assembly.

7. Replace the Cover & Clapper Mech- anism Assembly into the Body and replace the Cover Bolts as follows:

a. While holding the Cover down against the Body, hand tighten the Cover Bolt(s) located closest to the inlet end of the valve to help guide the Clapper into place [i.e., one Bolt for the 3 and 4 inch (80 and 100 mm) valves and two Bolts for the 6, 8, and 10 inch (150,200, and 250 mm) valves].

b. Replace the remaining Cover Bolts and hand tighten.

c. After all of the Cover Bolts are in place, cross-tighten the Cover

0 1

1 -Body &Vent Seal

2-Seat Ring g-Bolt, Spring Mechanism

3-Cover 1 O-Spring Mechanism

4-O-Ring, Cover 11 -Clapper

5-Bolt, Cover 12-Clapper Washer

6-Eyebolt 13-Clapper Nut

7-Vent Screw 14-Washer, Spring Mechanism

FIGURE D VALVE COMPONENTS

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Bolts with a torque sufficient to provide a water tight seal.

8. Return the fire protection system to operation.

NOTE After returning the fire protection sys- tem to service, notify the proper au- thorities and advise those responsible for monitoring proprietary andlor central station alarms.

Seller warrants for a period of one year from the date of shipment (warranty period) that the products furnished hereunder will be free from defects in material and workmanship.

For further details on Warranty, see Price List.

All orders for “standard order” Model EDC IV Detector Check Valves and replacement parts must include the description and catalog number. Cata- log numbers are not specified for “spe- cial order” Model EDC IV Detector Check Valves.

“Standard Order” EDC IV Detector Check Valves: Specify: (Specify size), (specify end configuration) Model EDC IV Detector Check Valve with red enamel finish and 3/4” NPT bypass ports, Cat. No.

WecW .

Flange x Flange 3’ (80 mm) . . . . . . . . . . . . XOR0004 4’ (100 mm) XOS0004 6’ (150 mm) XOToO04 6” (200 mm) XOUOO04 10” (250 mm) . XOV0004

Flange x Groove 4” (100 mm) XOS0014 6” (150 mm) . . . XOT0014 8’ (200 mm) . , XOUoOl4

Groove x Groove 4” (100 mm) . XOSO024 6” (150 mm) . XOTO024 8” (200 mm) XOUO024

“Special Order” EDC IV Detector Check Valves: Model EDC IV Detector Check Valves with epoxy coating, bypass trim or by- pass trim and water meters, as well as special bypass tap sizes, are provided according to order specifications. Or- ders should be accompanied by a sketch where appropriate.

Suitable water meters for use in the bypass include the 518 through 2 inch Hersey MVR or 400/500 Series. Con- tact your local distributor for water meter ordering information, as well as REC-1, ScanPak, and PitPak remote read options.

Replacement Parts: Specify: (Specify description) for use with (specify size) Model EDC IV De- tector Check Valve, Cat. No. (specify).

3 Inch (80 mm) Valve 4 - O-Ring, Cover Cat. No. AS761-2 10 - Spring

Mechanism . . . Cat. No. C5990 11 - Clapper Cat. No. 87866-l

4 Inch (100 mm) Valve 4 - O-Ring, Cover . Cat. No. AS761-2 10 - Spring

Mechanism Cat. No. C5990 ll- Clapper Cat. No. 87866-l

6 Inch (150 mm) Valve 4 - O-Ring, Cover . . Cat. No. AS761-3 10 - Spring

Mechanism Cat.No. C5991 11 - Clapper Cat. No. 87886-l

6 Inch (200 mm) Valve 4 - O-Ring, Cover Cat. No, AS761-4 10 - Spring

Mechanism Cat. No. C5992 11 - Clapper . . . . . . Cat. No.C5728-1

10 Inch (250 mm) Valve 4 - O-Ring, Cover, Cat. No. AS761-5 10 - Spring

Mechanism Cat. No. C5993 11 - Clapper Cat. No. C5747-1

A patent is pending with regard to cer- tain design features of the Model EDC IV Detector Check Valves.

@I Reg. trademark of GRINNELL CORPORATION, 3 TYCO PARK, EXETER, NH 03833 A tqC0 INTERNATIONAL LTD. COMPANY

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