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1 Differential-Pressure Sustaining Valve Description The Model FP-436 Differential-Pressure Sustaining Valve is a hydraulically-operated, diaphragm-actuated, control valve that sustains minimum pre-set, differential pressure between two points regardless of fluctuating flow or varying upstream pressure. Typical Applications pump overload & cavitation protection Safeguarding pump minimum flow 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 Emergency filter by-pass Foam re-circulation: maintains required foam pressure 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 A B Balancing between circuits in systems
2 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 [3] [1] [2] [4] Valve Closed (static condition) Valve Open (flowing condition) Tender Specifications 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.
3 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. Differential-Pressure Sustaining with Check Feature Model FP 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. Check Valve Model 70N Differential-Pressure Sustaining Model FP-436
4 Specifications Dimension Valve Size 2" 2 1 /2" 3" 4" 6" 8" 10" 12" mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch (1)L / / / / / / / /2 (2)L / / /16 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Tw / / / / / / / /16 Th / / / / / / /16 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. 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, 2 1 /2 & 3" Water Temperature C ( F) 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 info@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
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6 Item Part Name Size/Type Material Part No. Qty Note 1 MAIN VALVE 2-8 See Spec FP STREET ELBOW 3/8" S.S S STAGNATION FITTING 3/8 X3/8 S.S SS SLEEVE 3/8 S.S S MALE ELBOW 3/8"X3/8" S.S B NIPPLE 3/8" S.S S MALE ELBOW 3/8"X1/4" S.S B MALE CONNECTOR 3/8"X1/4" S.S B MALE CONNECTOR 3/8"X1/8" S.S B REDUCING NIPPLE 3/8"X1/4" S.S C MALE ELBOW 3/8"X1/2" S.S B TUBE 3/8" S.S S MALE CONNECTOR 3/8"X3/8" S.S B D PRESSURE SUSTAINING PILOT VALVE #3D 1/4" Brass R B PRIMING STRAINER 3/8 Brass B BALL VALVE 3/8" Brass B MANUAL EMERGENCY RELEASE - BALL VALVE 3/8 Brass NO. APPR D. QTY. DATE REVISIONS C 1995 BERMAD SCALE ORIG.DATE Not Scaled SIZE A4 SHEET 2 of 2 ASSEMBLY S PART NO. DRAWN: Itay N. DESIGN: Eshel D. APPROVED: Kenny A. TITLE Model: FP-436 Differential Pressure Sustaining Control Valve FILE.NO. FP/430/436-VDS
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Piston Actuated Valve Type G Hydraulic Control Valve is the most efficient valve for automatic operation of industrial and municipal distribution systems or any other system that requires adjustable working
PRESSURE REGULATORS LIQUID BACK PRESSURE
LIQUID BACK PRESSURE APPLICATION: Control back pressure in liquid packed systems where an auxiliary source of supply gas pressure is available. SUPPLY PRESSURE: Equal to or not less than 60% of controlled
Suction Guide & Flo-Trex Valve Series
Suction Guide & Flo-Trex Valve Series Pump Trim FILE NO: 6-1 DATE: August 2010 SUPERSEDES: 6-1 DATE: July 200 Series SG & FTV Suction Guides Designed for direct mounting on the suction flange of horizontal
Model descriptions. Technical data. Pressure and Temperature Limits Models 19, 20, 20P: -60 to 406 F Models 19M, 20M, 20MP:
VALVES & CONTROLS KUNKLE SAFETY AND RELIEF PRODUCTS Non-code Bronze Liquid Relief Valves Model descriptions Model 20 Model 19: All bronze, equipped with handwheel for easy adjustment within spring ranges.
VAG RIKO Plunger Valve
VAG Control Valves VAG RIKO Plunger Valve Self-lubricating bearing in the piston rod Closed bearing sealed with O-rings, bronze bearing bushes on both sides External profile sealing ring Self-locking worm
PRESSURE REDUCING VALVES
14.01 Part No. 536 536 WRAS APPROVED BRASS BODY WITH BSP THREADED CONNECTIONS SUITABLE FOR WATER & AIR The 536 pressure reducing valve is a economical and reliable solution for water and air applications.
PRESSURE REGULATORS GAS BACK PRESSURE. APPLICATION: Vent lines on oil separators, flow treaters, compressor stations, gas gathering systems.
GAS BACK PRESSURE APPLICATION: Vent lines on oil separators, flow treaters, compressor stations, gas gathering systems. CERTIFICATIONS: Canadian Registration Number (CRN): 0C16234.24567890NTY (Ductile)
Instructions for Installation, Operation, Care and Maintenance
Bulletin 59 Model DDX Deluge Valve (50 mm), ½ (65 mm), (80 mm), 76 mm, 4 (00 mm), 6 (50 mm), 65 mm & 8 (00 mm) Bulletin 59 Instructions for Installation, Operation, Care and Maintenance Wet Pilot Line,
PRESSURE REGULATORS LIQUID BACK PRESSURE
LIQUID BACK PRESSURE APPLICATION: Control back pressure in liquid packed systems where an auxiliary source of supply gas pressure is available. SUPPLY PRESSURE: Equal to or not less than 60% of controlled
3-way 1/2-2 Globe Valves
Datasheet Overview Designed to work with either an electronic actuator with a 3/4-inch (20 mm) stroke, the three-way globe valves are available in ANSI Class 250 for normally closed or normally open action.