Model ZW215FP Fire Pump Suction Control Valve Application The Zurn Wilkins Model ZW215FP Fire Pump Suction Control Valve is designed specifically for Fire Suppression Systems to prevent fire pumps from over-drawing from the water supply resulting in damage to the pump or the supply network because of very low or negative pressures on the suction side of the fire pump. The pilot assembly reacts quickly to increases and decreases of suction pressure. The control valve will close if suction pressure drops below the set pressure. The control valve will open again once suction pressure rises to the control valve set pressure and will modulate to keep the suction presOW FL OF sure at the set pressure until supply increases. In addition the N TIO Model ZW215FP comes standard with epoxy coating internally EC DIR and externally for corrosion protection, as well as a test cock on the sensing port for quick bleeding of sensing line. Options (Add suffix letters to ZW215FP) Standards Compliance: Function • FM Approved c C - 40XL Hydraulic Check with Isolation Valve Connections c G - IPS Grooved (inlet rating 300 psi) c TH - NPT Threaded (inlet rating 300 psi) c Y - ANSI Class 300 Flanges (inlet rating 300 psi) FM APPROVED Materials Main Valve Body Main Valve Bonnet Disc Guide Seat Disc Diaphragm Stem Spring Ductile Iron ASTM A536 Ductile Iron ASTM A536 Bronze ASTM B 176 Bronze ASTM B 176 Buna-N Rubber Nylon Reinforced Buna-N Stainless Steel Stainless Steel Standard Features c Epoxy Coated, FDA Approved • Blue - Class 150 Flange - Threaded Ends • Red Oxide - Class 300 Flange - Grooved Ends c Pilot Assembly • “Wye” Type Strainer • Sensing Line Test Cock • Visual Position Indicator • 3/8" Flare Sensing Line Connection c ANSI Class 150 Flanges Main Valve Options c SS - Stainless Steel Seat/Retainer/Cover Guide Pilot System c ST - Stainless Steel Tubing and Fittings c RV - Pilot on Reverse Side Schematic Diagram Item Description of Standard Features 1 Main Valve 2 SXL "Wye" Type Strainer 3 Restriction Fitting 4 PV-RLF Pressure Relief Valve 5 ZPI Visual Position Indicator 4 2 C 3 5 C Sizes Globe: Threaded ends, ANSI B1.20.1 c 2" - 3" 300 psi max. Flanged ends, ANSI B16.42 c 2" - 10" c ANSI Class 150, 250 psi max. c ANSI Class 300, 300 psi max. Grooved ends, AWWA C606 c 2" - 10" 300 psi max. Temperature Rating: c Water 33°F to 140°F Pilot Spring Range: c 10-30 psi Zurn Industries, LLC | Wilkins 1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 In Canada | Zurn Industries Limited 3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax 905-405-1292 www.zurn.com FLOW 1 Rev. B Date: 2/14 Document No. ACV-ZW215FP Product No. Model ZW215FP Page 1 of 3 Main Valve Dimensions * + , - . / + 0 1 2 3 3 4 5 6 7 < @ A B C 2 9 0 1 2 3 6 D C 7 D 7 7 9 : 4 5 9 ; 6 8 < 5 9 9 = 7 4 8 9 : > 5 9 2 G H C 7 4 : = 9 9 9 7 8 ; 5 9 6 : - 4 7 8 = 5 4 7 : . < 1 < 4 = E F 3 8 : 9 . - 6 7 8 9 7 ? 5 4 : 4 . 7 4 6 7 B 8 B : - 6 . < : = G - 4 < E : > : = : > H E F 9 7 9 9 6 : = 9 < 9 4 9 : > 9 6 6 : = 4 9 4 ; I : 9 ; < 9 9 - 0 1 2 3 3 1 2 G H C C 9 J B K K L C D M * N 2 O C , 2 P Q C , 2 9 0 1 2 3 9 : 9 ; < : : 4 9 9 ; 9 9 6 4 9 9 : 9 ; 9 7 6 < : > 4 6 4 7 < 9 : = : = 4 4 < < 9 9 : 9 ; E < : 9 ; I < : = < : > = 4 9 : = 9 : 4 = : < 9 : 4 < : > > S 7 9 7 9 7 ; < < : I 9 : 9 ; 9 ; 4 > 9 6 : 9 ; 6 : 9 ; 9 6 : 9 ; 9 6 I 6 6 9 : < : ; < 2 G H < : > : = > 9 : 4 6 9 : 4 ; ; 9 : > I < : > : 4 F A = C F < 9 : > < < 9 6 9 = < : > T 0 1 2 3 3 1 2 G H C F < . U @ M K D V @ 2 . U @ 0 L B S U 1 X H @ 2 . U @ 0 K L C B @ 2 2 1 L C / P C O + G P C B G 2 1 @ A B C 2 5 / P C O @ B 2 L C N 5 - U N 1 K W P W / B V K Q 3 P S C ] P O ^ N D [ 8 4 < : > < : > 9 9 : 4 < : > < : > 9 9 : = 9 : 4 9 : 4 < : > < : > 9 < 4 9 7 \ < 4 9 : > \ 4 7 9 : > \ 4 7 9 : > \ 4 7 < : = 9 \ 9 ; < : = \ 9 ; : > I 6 : = 6 9 6 7 : 9 I ; 9 < 7 : 9 9 > ; 9 7 4 < : = 6 > 4 6 < : 7 7 = 4 9 I < : 7 7 9 ; X 3 O C G , 2 Q S , 2 Q S , : 9 \ < 3 N K G Y 3 8 N G a A C 3 N G a A C 3 5 c 9 4 . 5 b 7 < _ S * 4 : G 5 ` : 9 Pilot System Dimensions 9 8 1 9 4 W F Z = : W < Y : W 9 J D E = 9 E F 1 7 = B 3 < > E Q 6 : R 9 * 9 E < ; 0 9 E ; 2 Q S N G a A C 9 9 9 : > 8 < < : = 8 = < : = 9 9 9 : > 9 > = 9 > 9 : > < : 6 = 9 > : = : 4 9 < < 6 : I 9 3 : = : 4 > 9 I ; I 9 7 4 : < = : > 9 7 9 4 9 4 6 9 : = : > < 9 9 9 9 < I : : 9 > = : Z 4 E Operation The Zurn Wilkins ZW215FP utilizes a pressure relief pilot valve that installs on the discharge side of the control circuitry. The pilot Model PV-RLF is a direct acting, normally closed, spring loaded, diaphragm actuated valve. The operation of the ZW215FP begins with accurately sizing the valve, then fine tuning the control circuitry by adjusting the PV-RLF to open at the desired suction pressure. A sensing line runs externally from the suction side of the pump to the pilot control chamber under the diaphragm. Thus, suction pressure exceeding the preset of the pilot acts to open the pilot valve while the adjustable spring in the pilot seeks to keep it closed. The result is a modulating action in the pilot that is transmitted to the cover of the main valve. This creates a mirror modulation of the diaphragm assembly in the main valve. Suction pressure is maintained within narrow limits regardless of changing flow rates or outlet pressure when supply has decreased below acceptable limits. Flow Characteristics Suggested flow calculations are based on flow through Schedule 40 Pipe. Maximum continuous flow is approx. 20 ft./sec (6.1 meters/sec) & maximum surge is approx. 25 ft./sec (7.6 meters/sec). Many factors should be considered in sizing pressure relief valves including inlet pressure, outlet pressure and flow rates. " " # $ ( ! & ' # $ % " # $ " # & % % ( % % ' # ) ' ! # $ # % # # % # ( # % SENSING LINE Typical Installation TO FIRE SUPPRESSION NETWORK DIRECTION OF FLOW FIRE PUMP ZW215FP SUCTION PREESURE REGULATING VALVE ZW205FP FIRE PUMP RELIEF VALVE ZW209FP FIRE PROTECTION PRESSURE REDUCING VALVE MODEL P4000A THERMAL EXPANSION RELIEF VALVE FIRE PROTECTION WATER SOURCE Zurn Industries, LLC | Wilkins 1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 In Canada | Zurn Industries Limited 3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax 905-405-1292 www.zurn.com Page 2 of 3 Flow Characteristics BODY MINIMUM FRICTION LOSS 100 d e f e e e i j h g e o e PRESSURE DROP (PSI) k l m k n 10 1 0 10 100 1000 10000 FLOW (GPM) Specifications The Fire Pump Suction Control Valve shall be a single seated, line pressure operated, diaphragm actuated, pilot controlled globe valve. The valve shall seal by means of a corrosion-resistant seat and resilient, rectangular seat disc. These and other parts shall be replaceable in the field; all such service and adjustments to be possible without removing the valve from the line. The stem of the basic valve shall be guided top and bottom by integral bushings. The basic valve and its pilot control system shall contain no packing glands or stuffing boxes. The diaphragm shall not be used as a seating surface nor shall pistons be used as an operating medium. All internal and external ferrous surfaces shall be coated with a high quality, fusion epoxy coating. The pilot control system shall include a direct-acting, normally closed, spring-loaded, diaphragm actuated pilot valve with the stem guided between the diaphragm assembly and seat disc. To ensure precise suction pressure control the appropriately rated pilot valve shall be field adjustable within the pressure control range of the spring. The Fire Pump Suction Control Valve shall be a ZURN WILKINS Model ZW215FP. Zurn Industries, LLC | Wilkins 1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 In Canada | Zurn Industries Limited 3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax 905-405-1292 www.zurn.com Page 3 of 3
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