The RAIN BIRD 100-HVF-NPT Inline Sprinkler Valve's compact design makes it easier to install and allows you to put more valves in a single valve box &  the heavy-duty construction and fewer screws ensure simplified maintenance. 
1 Inch (25mm) inline sprinkler valve with flow control & BSP inlet threads 
Equipped with an easy-to-turn, pressure-assisted flow control mechanism & a Buna-N diaphragm with a self-cleaning 90-mesh pilot water filter
External & internal manual bleed allows quick & easy flushing of the system & spray-free operation
Glass-filled polypropylene construction - for added durability
Eccentric diaphragm ensures smooth closing & less water hammer
Captive multi-drive screws provide hassle-free valve maintenance
Rain Bird Valves are well known in the industry as one of the most reliable residential valves on the market. Built for high performance & reliability, the perfect residential valve choice. Rain Bird® HV valves install quickly, service easily, and deliver the reliable performance you can count on.Rain Bird Corporation is a global privately-held manufacturer and supplier of irrigation products and services for landscapes, sports fields, golf courses, and agriculture - designed to minimize water consumption.HV Series Valve Performance Chart: Operating Range:
Pressure: 15 - 150psi (1.0 - 10.3bar)
Flow: 0.05 - 6.82m³/h; 0,01 - 1.89l/s (0.2 - 30gpm)
Operating temperatures: Water temperature up to 43°C (110°F); ambient temperature up to 52°C (125°F)
Product specifications:
Model: 100-HVF-BSP = 25cm (1in) HV Series inline sprinkler valve with flow control - female x female threaded
24VAC 50/60Hz (cycles/sec.) solenoid
Inrush current: 0.290A at 60Hz
Holding current: 0.091A at 60Hz
Coil resistance: 70-85Ohms (40°F - 110°F)
Dimensions:
Height: 11.7cm
Length: 11.2cm
Width: 7.9cm
Recommendations:
Rain Bird recommends flow rates that result in discharge velocities in the supply line not to exceed 2.3m/s (7.5ft/sec) in order to reduce the effects of water hammer.
Rain Bird residential valves cannot be used with PRS pressure regulating modules.
Not recommended for use with two-wire systems.