Pilot Operated Ventable Relief Valves

Parker’s pilot operated ventable relief valves offer the ability to control the pressure setting using either internal adjustment or remote circuit; ideal in applications that require multiple settings up to 420 bar (6000 psi) and 400 lpm (106 gpm).

Полное описание продукта

Parker’s pilot operated ventable relief valves provide high accurate and reliable performance for hydraulic circuits that require multiple pressure relief settings or require a remotely pilot controlled relief. These valves can work with hydraulic systems that reach pressures up to 420 bar (6000 psi) and flows up to 400 lpm (106 gpm) and aren’t necessarily sensitive to leakage due to the spool design. Parker’s pilot operated ventable relief valves are designed unloading or remotely controlled applications and can be use anywhere within mobile hydraulic and industrial markets, such as presses, clamps, or lift circuits.

Markets:
• Miscellaneous Industrial
• Miscellaneous Manufacturing
• Miscellaneous Mobile

Features/Benefits:
• High flow capacity
• Integral 250 micron pilot flow filter
• All external parts zinc plated
• High accuracy - pilot operated design
• Hardened, precision ground parts for durability
• Compact size for reduced space requirements

Applications:
• Pump relief
• Press or clamp circuits
• Remote control applications
• Vented Unloading

Additional Technical Insight:
Ventable relief valves are pilot operated, spool type pressure controls. Like other pilot operated relief valves, the ventable relief has a main pilot spring chamber, and a bias spring chamber separated by a pilot orifice. The internal adjustment controls the main pilot spring setting. When pressure in the system builds above the setting of the main pilot setting, the pilot seat will lift allowing the spool to travel to the open position passing flow. What makes ventable relief valves unique is the valve offers an isolated vent chamber that is connected to the bias spring chamber. This allows for the valve to open at a lower pressure than the setting of the main spring.

The circuit designer has the ability to apply an external control valve or valves to set the operating pressure of the bias spring that must be overcome to allow the valve to open. This is an ideal solution in applications that may require variable pressure settings in normal operation.

One must consider the leakage component when applying any pilot operated spool type relief valve, as by design, the spool will pass a small leakage flow.

Характеристики

Расход:	18, 50, 106 Gal/min, 68, 190, 400 L/min
Максимальное расчетное давление на входе:	3000, 5500, 6000 psi, 210, 380, 420 bar
Диапазон регулирования давления:	100-1000, 200-2000, 145-3000, 300-3000, 500-5000, 145-6000 psi, 6.9-69, 13.8-138, 10-210, 20.7-210, 34.5-350, 10-420 bar
Регулировочный механизм:	Fixed, Knob, Screw, Tamper Resistant
Материал уплотнения:	D-Ring (Standard), Fluorocarbon, Nitrile
Максимальный расход:	18, 50, 106 Gal/min, 68, 190, 400 L/min
Максимальное рабочее давление:	3000, 5000, 6000 psi, 310, 350, 420 bar
Максимальное давление в баке:	5000, 6000 psi, 350, 420 bar
Стандартное давление посадки:	500, 1000, 1450, 1500, 2500, 2900 psi, 34.5, 69, 100, 103.5, 172.4, 200 bar
Уставка максимального давления:	1000, 2000, 3000, 5000, 6000 psi, 69, 138, 210, 350, 420 bar
Чувствительность регулирования давления:	N/A, 285 per turn, 435 per turn, 570 per turn, 800 per turn, 855 per turn, 1910 per turn psi, N/A, 20 per turn, 30 per turn, 39 per turn, 55 per turn, 59 per turn, 132 per turn bar
Давление закрытия:	N/A, 80% of pressure setting
Тип срабатывания:	Pressure Sensing
Конфигурация:	Ventable Pressure Relief
Интенсивность утечек:	25 @ 1450 psi (100 bar), 100 @ 1450 psi (100 bar), 5 per 100 psi (6.8 bar) setting cm3/min
Тип монтажа:	Screw in cartridge valve
Размер полости:	C10-3, C10-3S, C16-3S
Функция:	Pilot Operated
Тип эксплуатации:	Automatic
Для типа жидкости:	Mineral-based or synthetic hydraulic fluids
Максимальная кинематическая вязкость:	45-2000 SSU (6 to 420 cSt)
Показатель эффективности фильтра:	ISO 4406 18/16/13, SAE Class 4
Материал клапана:	All parts steel. All operating parts hardened steel
Момент затяжки при монтаже:	37, 48, 74 lb-ft, 50, 65, 100 Nm
Рабочая температура:	-35 to +200, -30 to +250, -15 to +400 °F, -37 to +93, -34 to +121, -26 to +204 °C
Максимальная рабочая температура:	+200, +250, +400 °F, +93, +121, +204 °C
Минимальная рабочая температура:	-35, -30, -15 °F, -37, -34, -26 °C
Вес:	0.5, 0.55, 1.28 lb, 0.23, 0.25, 0.58 kg
Материал корпуса:	N/A