Instrumentation Relief Valve

Instrumentation Relief Valves

Introduction

The YSRV01 Series Instrumentation Relief Valve is a compact and high-performance safety device designed to protect instrumentation systems from overpressure conditions. Engineered with precision and durability in mind, it automatically relieves excess pressure by venting when system limits are exceeded, ensuring safe and reliable operation. Its stainless steel construction offers superior resistance to corrosion, making it ideal for use in demanding environments such as chemical processing, gas sampling, and hydraulic control systems.

This relief valve features an adjustable pressure setting, available with soft or metal seat options to suit different media and application needs. With its space-saving design, standard 1/4″ threaded connections, and ease of maintenance, the YSRV01 is well-suited for installation in confined spaces or on instrumentation panels. Whether used in laboratories, refineries, or industrial automation systems, the YSRV01 provides consistent performance and long-term reliability.

Applications

Oil & Gas Industry

Control of hydrocarbon fluids, sampling, and pressure measurement systems.

Water Treatment

Flow regulation in filtration, sampling, and chemical dosing systems.

Power Generation Industry

Steam systems, pressure monitoring, and boiler instrumentation.

Chemical Plants

Flow control in chemical dosing, mixing systems, and sampling lines.

Pharmaceutical Industry

Sterile fluid control and pressure monitoring in cleanroom environments.

Mining & Metals

Control of slurry, reagent dosing, and pressure monitoring systems.

Features & Benefits

High-Pressure Valves

Service up to 6000 psig (413 bar)
Multiple springs for a selection of set pressure ranges
Valves available factory-set to a specified set pressure
1/4 in. and 6 and 8 mm end connections
1/2 in. and 12 mm end connections

Spring Kits

Spring kits include spring, label, 302 SS lock wire with seal, Select a spring kit basic ordering number and add the spring designator for the desired set pressure range.

Factory-Set Valves

YSRV01 series valves are available with springs factory-set to a specified set pressure. Valves are set, tested, locked, and tagged with the set pressure.

Set Pressure Range (psig (bar))	Spring Designator	Spring Color
50 to 350 (3.4 to 24.1)	A	Blue
350 to 750 (24.1 to 51.7)	B	Yellow
750 to 1500 (51.7 to 103)	C	Purple
1500 to 2250 (103 to 155)	D	Orange
2250 to 3000 (155 to 206)	E	Brown
3000 to 4000 (206 to 275)	F	White
4000 to 5000 (275 to 344)	G	Red
5000 to 6000 (344 to 413)	H	Green

Operation

R series relief valves OPEN when system pressure reaches the set pressure and CLOSE when system pressure falls below the set pressure.

For valves not actuated for a period of time, initial relief pressure may be higher than the set pressure.

Instrumentation Relief Valve : YSRV01

END CONNECTOR		DIMENSION (MM)						PART NO.
INLET	OUTLET	A	B	C	D	E	F	PART NO.
1/4″ ODT	1/4″ ODT	68.6	36.6	40.6	10.9	105.0	20.6	YSRV01-TT4
6mm ODT	6mm ODT	68.6	36.6	40.6	10.9	105.0	20.6	YSRV01-TT6M
8mm ODT	8mm ODT	68.6	36.6	40.6	10.9	105.0	20.6	YSRV01-TT8M
3/8″ ODT	3/8″ ODT	68.6	37.6	40.6	10.9	105.0	20.6	YSRV01-TT6
10mm ODT	10mm ODT	68.6	37.6	40.6	10.9	105.0	20.6	YSRV01-TT10M
1/4″ MNPT	1/4″ ODT	68.6	30.2	36.6	10.9	98.8	20.6	YSRV01-MT4
1/4″ MNPT	1/4″ FNPT	68.6	30.2	30.2	10.9	98.8	20.6	YSRV01-MF4N
1/4″ MBSPT	1/4″ FBSPT	68.6	30.2	30.2	10.9	98.8	20.6	YSRV01-MF4RT
12mm ODT	12mm ODT	104	46.5	46.5	12.7	150.0	22.2	YSRV01-TT12M
1/2″ ODT	1/2″ ODT	104	46.5	46.5	12.7	150.0	22.2	YSRV01-TT8
1/2″ MNPT	1/2″ ODT	104	36.3	46.5	12.7	140.0	22.2	YSRV01-MT8
1/2″ MNPT	1/2″ FNPT	104	36.3	36.3	16.0	140.0	28.0	YSRV01-MF8N
3/4″ ODT	3/4″ ODT	104	41.3	38.5	19.0	140.0	33.0	YSRV01-TT12
3/4″ MNPT	3/4″ FNPT	104	41.3	38.5	19.0	140.0	33.0	YSRV01-MF12N
1″ ODT	1″ ODT	104	46.5	44.0	22.0	150.0	44.0	YSRV01-TT16
1″ MNPT	1″ FNPT	104	46.5	44.0	22.0	150.0	44.0	YSRV01-MF16N

Instrumentation Relief Valve