Pilot-Operated Regulator AR425 to 935 Series

Pilot-Operated Regulator AR425 To 935 Series: Detailed Examples

Pilot-Operated Regulator AR425 To 935 Series Specifications

Standard specification

Model	AR425	AR435	AR625	AR635	AR825	AR835	AR925	AR935
Connection port size	1/4, 3/8, 1/2		3/4, 1		1 1/4, 1 1/2		2
Applicable fluids	Air
Proof pressure	1.5 MPa
Maximum operating pressure	1.0 MPa
Note 1) Set pressure range (MPa)	0.05 to 0.83	0.02 to 0.2	0.05 to 0.83	0.02 to 0.2	0.05 to 0.83	0.02 to 0.2	0.05 to 0.83	0.02 to 0.2
Note 2) Air consumption amount (bleed port part)	5 L/min (ANR) (at maximum set pressure)
Pressure gauge connection port size	1/4
Ambient temperature and working fluid temperature	-5 to 60°C (no freezing)
Structure	Internal pilot relief type (pilot air is always bleeding)
Weight (kg)	0.7		1.1		2.5		4.5

Note 1) Outlet pressure adjustment range: P2 is 90% of P1 or less
Note 2: Air consumption varies depending on the set pressure. Structurally, even if the handle is at the maximum setting, the pressure gap between the inlet and outlet cannot be set within 0.03 MPa.

Options / Part No.

Name	Part number
	Model
	For AR4□5	For AR6□5	For AR8□5	For AR9□5
Bracket	B24P	B25P	–	–
Pressure gauge with limit indicator Note 1)	G46-10-□02 (Max. measurement: 1.0 MPa), G46-2-□02 (Max. measurement: 0.2 MPa)

Note 1) The □ in the part number for the pressure gauge (e.g. G46-10-□02) indicates the connection thread type. Insert no symbol for Rc, and use “N” for NPT.
Note 3) Do not tighten excessively when mounting a pressure gauge. Doing so may result in breakage. Use sealing tape for sealing.

Model Number Notation

Structural Drawings

When handle (10) is turned clockwise to compress the pressure adjustment spring (8), the pressure from the IN side passes through diaphragm (11), opens the pilot valve (12) and enters upper pilot chamber (13). This pressure and the force generated by the pressure adjustment spring (8) act as resistance, resulting in an equilibrium. Then, this pressure passes through the diaphragm (6) of the main valve side and stem (14), and pushes the valve (main valve) (7) open, thus guiding the pressure to the OUT side. At the same time, the pressure passes through the feedback hole (15), and enters the diaphragm chamber (16), thus establishing the OUT side pressure (outlet pressure).

Component Parts

Number	Part name	Materials	Additional notes
1	Body	*Die-cast aluminum	Platinum silver coated
2	Bonnet	Die-cast aluminum	Platinum silver coated
3	Chamber	Die-cast aluminum	Platinum silver coated
4	Valve guide	*Zinc die-cast	Platinum silver coated

• *For AR825/AR835/AR925/AR935, the material is aluminum alloy.

Replacement Parts

Number	Part name	Materials	Quantity	Part number
				AR425/435	AR625/635	AR825/835	AR925/935
5, 11	Exhaust valve assembly (Note 1)	–	1	132586A	132586A	132586A	132586A
6	Main valve side diaphragm assembly	–	1	132581A	132659A	13275A	13285A
7	Valve assembly	–	1	132572A	132653A	132752A	132829A
8	Pressure regulator spring	Steel wire	1	135053 (AR425) 135025 (AR435)	135053 (AR625) 135025 (AR635)	135053 (AR825) 135025 (AR835)	135053 (AR925) 135025 (AR935)
9	Valve spring	Stainless steel	1	135211	132656	132713	13289
10	Handle	ABS	1	13414

Note 1) Including diaphragm

Pilot-Operated Regulator AR425 to 935 Series Dimensional Drawings

Model	Connection port size	Pressure gauge connection port size	A	B	C	D	E	F	Bracket mounting dimensions			Bracket Part no.
									G	H	J
AR425/435	1/4, 3/8, 1/2	1/4	80	145.5	39.5	67	73	3	50.0	48	80	B24P
AR625/635	3/4, 1	1/4	98	155	43	78	78.5	7	85	52	90	B25P
AR825/835	1 1/4, 1 1/2	1/4	126	216	75	110	94.5	5	–	–	–	–
AR925/935	2	1/4	160	241	90	140	109.5	10	–	–	–	–

• *With pressure gauge: Pressure gauges shipped with regulator.

Usage precautions

• *Release the lock to adjust the pressure. After the adjustment, engage the lock. Failure to observe this procedure could damage the handle or cause the outlet pressure to fluctuate. Loosen the handle locking screw to release the lock, and tighten it to lock it.
• *Please consult the manufacturer separately if the product is to be used between solenoid valves and actuators.