fp436

8/9/2019 FP436

http://slidepdf.com/reader/full/fp436 1/6

400 Series

BERMAD Fire Protection

Features and Benefits

Hydraulically-powered valve design

❑ Closes drip-tight time after time

❑ Eliminates jamming problems

Hydro-efficient body design

❑ Wide rangeability

❑ Unrestricted flow path

One-piece molded single moving part –

no maintenance required

Simple design – cost effective

Factory pre-assembled trim – Out-of-Box Quality

In-line serviceable – minimal down time

Optional Features Large control filter (code: F)

Valve-position flow indicator

Seawater service construction

Note: Optional features can be mixed and matched.

Consult your local BERMAD representative for full details

Description

The Model FP-436 Differential-Pressure Sustaining

Valve is a hydraulically-operated, diaphragm-actuated,

control valve that sustains minimum pre-set, differentialpressure between two points regardless of fluctuating

flow or varying upstream pressure.

Typical Appli cations

A

B

pump overload & cavitation protection

Safeguarding pump minimum flow

Emergency filter by-pass

Foam re-circulation: maintains requiredfoam pressure

Balancing between circuits in systems

Differential-Pressure

Sustaining Valve

Model - FP 436

8/9/2019 FP436


400 SeriesModel - FP 436


Tender Speci fications

The Differential-Pressure Sustaining Valve shall sustain minimum pre-set, differential pressure between two points

regardless of fluctuating flow or varying upstream pressure.The main valve shall be a diaphragm-actuated, globe pattern (or angle) valve.Valve actuation shall be accomplished by a

fully peripherally supported, one-piece balanced rolling-diaphragm, vulcanized with metal insert. The diaphragm

assembly shall be the only moving part.

The valve shall have a removable cover for quick in-line service enabling all necessary inspection and servicing.

The valve shall have an unobstructed flow path, with no stem guide or supporting ribs.

The pilot system shall be field adjustable, with adjustable valve closing speed integrated to the main valve,

hydraulically-tested and supplied as an assembly consisting of:

Differential Pressure Sustaining Pilot valve as part of the assembly with built-in, internal needle valve

"Y" strainer

The Trim shall be supplied as an assembly, pre-assembled and hydraulically tested at an ISO 9000 & 9001

certified factory.

Operation

The Model FP-436 is a pilot-controlled valve equipped with an adjustable, 2-way, Differential-Pressure Sustaining Pilot.

The needle valve [1] continuously allows flow from valve inlet into the control-chamber [2]. The pilot [3], locally or

remotely, senses both high pressure below its diaphragm and low pressure above it.

Should differential pressure fall below pilot setting, the pilot throttles, enabling pressure to accumulate in the

control-chamber, causing the main valve to throttle, sustaining differential pressure at the pilot setting.

Should differential pressure rise above pilot setting, the pilot releases accumulated pressure causing the main valve to

modulate open.

The needle valve controls the closing speed. The Cock-Valve [4] enables manual override to fully-open the valve in case

of emergency

Valve Closed (static condition) Valve Open (flowing condition)

[2]

[3]

[1]

[4]

8/9/2019 FP436


400 Series


Model - FP 436

Typical Applications

Emergency Filter by-pass

In filtration systems there are two cases

when by-passing the filter is essential:

Blocked filter (potentially causing

element collapse)

Demand for Emergency fire-water

The Model FP-436, installed as a

by-pass, progressively compensates for

excessive demand.

Adding feature "S" incorporates alarm

signaling attribute.

Pump Overload & Cavitation Protection

Where suction pressure regimes vary, the Model FP-436 is needed to limit pump flow by

sustaining pump differential pressure, preventing pump overload and cavitation damage

caused by excessive demand.

Adding check feature “20”, saves the cost of a line-sized check valve.

Differential-PressureSustaining withCheck FeatureModel FP-436-20

Check Valve Model 70N

Differential-PressureSustaining Model FP-436

8/9/2019 FP436


Model - FP 436 400 Series


Specifications

Manufacturers Standard Materials

Main valve body and cover

• Ductile Iron ASTM A-536

Main valve internals

• Stainless steel and Natural Rubber

Control System• Forged brass accessories and fittings,

copper tubing

Coatings, Red (RAL 3000)

• Electrostatic Powder Coating Polyester

Optional Materials

Main valve body and accessories

• Carbon steel ASTM A-216-WCB

• Stainless steel 316

• Ni-Al bronze ASTM B-148

Control System• Stainless steel 316

Coating

• Fusion Bonded Epoxy with UV

Protection, Anti-Corrosive

Connection Standard

• Flanged: ANSI B16.42 (Ductile Iron),

B16.5 (Steel & Stainless),

B16.24 (Bronze), B16.1 (Cast iron),

ISO PN16

• Threaded: NPT or BSP for 2, 21 / 2 & 3"

Water Temperature

• 0.5 – 50°C (33 – 122°F)

Notes:1.L1 is for flanged valves.2. L2 is for threaded NPT or BSP.3. Tw & Th are max for pilot system.

4. Data is for envelope dimensions, component positioning may vary.5. Provide space around valve for maintenance.

Valve Size 2" 21/2" 3" 4" 6" 8" 10" 12"

mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch

(1)L1 205 81 / 2 205 81 / 2 250 913 / 16 320 129 / 16 415 165 / 16 500 1911 / 16 605 2313 / 16 725 281 / 2

(2)L2 180 71 / 16 210 81 / 4 255 101 / 16 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Tw 284 113 / 16 284 113 / 16 300 113 / 16 313 125 / 16 341 137 / 16 415 165 / 16 443 177 / 16 481 1815 / 16

Th 210 81 / 4 210 81 / 4 215 87 / 16 243 99 / 16 315 123 / 8 350 133 / 4 382 15 430 615 / 16 D i m e n s i o n

[email protected] • www.bermad.com The information contained in this document is subject to change without notice. BERMAD shall not be

liable for any errors contained herein. All rights reserved © Copyright by BERMAD. PE4PE-300 04

8/9/2019 FP436


8/9/2019 FP436


TITLE

Model: FP-436

Differential Pressure Sustaining

Control Valve

FILE.NO. FP/430/436-VDS

ORIG.DATE

10.05.04

SCALE

Not Scaled

SHEET 2 of 2SIZE

A4

DRAWN: Itay N.

DESIGN: Eshel D.

APPROVED: Kenny A.

NO. APPR’D. QTY. DATE

R E V I S I O N S

C 1995 BERMAD ASSEMBLY’S PART NO.

Item Part Name Size/Type Material Part No Qty Note

1 MAIN VALVE 2-8” See Spec FP-400 1

29 STREET ELBOW 3/8" S.S 316 063838S116 2

31 STAGNATION FITTING 3/8”X3/8” S.S 316 3638SS0000 1

32 SLEEVE 3/8” S.S 316 3638S53806 1

33 MALE ELBOW 3/8"X3/8" S.S 316 063838B069 2

34 NIPPLE 3/8" S.S 316 063838S122 1

36 MALE ELBOW 3/8"X1/4" S.S 316 063804B069 2

37 MALE CONNECTOR 3/8"X1/4" S.S 316 063804B068 2


39 REDUCING NIPPLE 3/8"X1/4" S.S 316 063804C123 1

40 MALE ELBOW 3/8"X1/2" S.S 316 063802B069 1

41 TUBE 3/8" S.S 316 073807S000 1


3D PRESSURE SUSTAINING PILOT VALVE #3D 1/4" Brass 500401R100 1

4B PRIMING STRAINER 3/8” Brass 9901000126 1

5B BALL VALVE 3/8" Brass 990124007 2

15B MANUAL EMERGENCY RELEASE - BALL VALVE 3/8” Brass 990124007 1

fp436

Documents