Unloader, Safety & Flow Control Valves

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Unloader, safety, and flow control valves are essential components in any pressure washing system. Unloader valves regulate pressure and allow your pump to bypass water when the trigger is released, while relief and safety valves provide protection against overpressure to safeguard pumps, hoses, and other equipment. Flow regulators play a complementary role by controlling and stabilizing water flow, which is particularly useful in multi-gun setups, chemical applications, and when using attachments that require consistent performance, helping ensure smooth, efficient, and reliable operation.

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Bertolini Pumps

SKU: 041002

Bertolini APR 20: 2000 psi @ 5.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$72.00
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P.A.

SKU: 041009

P.A. Pulsar Rv: 2300 psi @ 10 US gpm Unloader Bypass Valve w/ Knob

Chemical injector: No

Inlet: 3/8-in Female

Outlet: 3/8-in Female

Bypass: 3/8-in Female

MSRP:

Was:

Price Now:

$72.00
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P.A.

SKU: 041020

P.A. VB 3: 3200 psi @ 6.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 3/8-in Male

Outlet: 3/8-in Male

Bypass: 3/8-in Female

MSRP:

Was:

Price Now:

$52.00
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P.A.

SKU: 042000

P.A. VB 60/600 Zero: 8700 psi @ 16 US gpm Flow-Sensitive Unloader Valve

Chemical injector: No

Inlet: 1/2-in Female

Outlet: 1/2-in Female

Bypass: 1/2-in Female

MSRP:

Was:

Price Now:

$760.00

Only 2 in stock
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Bertolini Pumps

SKU: 041000

Bertolini APR.U 14: 1450 psi @ 5.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$72.00
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Bertolini Pumps

SKU: 041008

Bertolini APR.I 40: 4000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

Chemical injector: Yes

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$96.00
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P.A.

SKU: 043812

P.A. VB 135: 2300 psi @ 6.5 US gpm Bolt-On Unloader Valve

Chemical injector: No

Inlet: 1/2-in Female

Outlet: 3/8-in Male

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$85.00
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P.A.

SKU: 043002

P.A. VB 140/160: 2300 psi @ 37 US gpm Unloader Valve

Chemical injector: No

Inlet: 3/4-in Female

Outlet: 3/4-in Female

Bypass: 3/4-in Female

MSRP:

Was:

Price Now:

$236.00

Out of stock
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Bertolini Pumps

SKU: 041016

Bertolini APR.I 30: 3000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

Chemical injector: Yes

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$88.00

Out of stock
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P.A.

SKU: 042003

P.A. VB 450/200: 2900 psi @ 120 US gpm Unloader Valve

Chemical injector: No

Inlet: 1¼-in Female

Outlet: 1¼-in Female

Bypass: 1½-in Female

MSRP:

Was:

Price Now:

$920.00

Out of stock
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Bertolini Pumps

SKU: 041015

Bertolini APR.I 20: 2000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

Chemical injector: Yes

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$88.00
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Bertolini Pumps

SKU: 041004

Bertolini APR.I 25: 2500 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

Chemical injector: Yes

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$88.00

Nozzle Size	Flow	Operating Pressure Range (psi)
Orifice	Flow rate	362	435	507	580	652	725	797	870	942	1015
0.15 mm (0.006″)	L/min	0.03	0.033	0.036	0.038	0.04	0.043	0.045	0.047	0.049	0.05
0.15 mm (0.006″)	US gpm	0.008	0.009	0.009	0.01	0.011	0.011	0.012	0.012	0.013	0.013
0.20 mm (0.008″)	L/min	0.04	0.044	0.048	0.051	0.054	0.057	0.06	0.062	0.065	0.068
0.20 mm (0.008″)	US gpm	0.011	0.012	0.013	0.013	0.014	0.015	0.016	0.017	0.017	0.018
0.30 mm (0.012″)	L/min	0.068	0.075	0.081	0.086	0.091	0.096	0.101	0.105	0.11	0.114
0.30 mm (0.012″)	US gpm	0.018	0.02	0.021	0.023	0.024	0.025	0.027	0.028	0.029	0.03
0.40 mm (0.016″)	L/min	0.104	0.113	0.123	0.131	0.139	0.146	0.154	0.16	0.167	0.173
0.40 mm (0.016″)	US gpm	0.027	0.03	0.032	0.035	0.037	0.039	0.041	0.042	0.044	0.046
0.50 mm (0.020″)	L/min	0.114	0.125	0.135	0.144	0.153	0.161	0.169	0.176	0.183	0.19
0.50 mm (0.020″)	US gpm	0.03	0.033	0.036	0.038	0.04	0.043	0.045	0.047	0.048	0.05
0.60 mm (0.024″)	L/min	0.138	0.152	0.164	0.175	0.186	0.196	0.205	0.215	0.223	0.232
0.60 mm (0.024″)	US gpm	0.037	0.04	0.043	0.046	0.049	0.052	0.054	0.057	0.059	0.061
0.80 mm (0.032″)	L/min	0.165	0.181	0.195	0.209	0.221	0.233	0.245	0.256	0.266	0.276
0.80 mm (0.032″)	US gpm	0.044	0.048	0.052	0.055	0.058	0.062	0.065	0.068	0.07	0.073
1.00 mm (0.040″)	L/min	0.188	0.206	0.222	0.237	0.251	0.264	0.276	0.287	0.298	0.308
1.00 mm (0.040″)	US gpm	0.05	0.054	0.059	0.063	0.067	0.07	0.073	0.076	0.079	0.081
1.20 mm (0.048″)	L/min	0.207	0.227	0.245	0.262	0.278	0.293	0.307	0.32	0.332	0.343
1.20 mm (0.048″)	US gpm	0.054	0.06	0.065	0.069	0.073	0.077	0.081	0.085	0.088	0.091

Orifice	Contour based angle
0.10 / .004″	19.90°
0.15 / .006″	55.70°
0.20 / .008″	72.50°
0.30 / .012″	74.60°
0.40 / .016″	82.00°
0.50 / .020″	72.50°
0.60 / .024″	91.00°
0.80 / .032″	105.80°
1.00 / .040″	106.90°
1.20 / .048″	114.00°

Unloader, Safety & Flow Control Valves

Bolt-On Unloaders

Thread-On Unloaders

Flow Regulators

Safety & Relief Valves

Bertolini APR 20: 2000 psi @ 5.5 US gpm Unloader Valve

P.A. Pulsar Rv: 2300 psi @ 10 US gpm Unloader Bypass Valve w/ Knob

P.A. VB 3: 3200 psi @ 6.5 US gpm Unloader Valve

P.A. VB 60/600 Zero: 8700 psi @ 16 US gpm Flow-Sensitive Unloader Valve

Bertolini APR.U 14: 1450 psi @ 5.5 US gpm Unloader Valve

Bertolini APR.I 40: 4000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

P.A. VB 135: 2300 psi @ 6.5 US gpm Bolt-On Unloader Valve

P.A. VB 140/160: 2300 psi @ 37 US gpm Unloader Valve

Bertolini APR.I 30: 3000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

P.A. VB 450/200: 2900 psi @ 120 US gpm Unloader Valve

Bertolini APR.I 20: 2000 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

Bertolini APR.I 25: 2500 psi @ 5.5 US gpm Unloader Valve w/ Fixed Injector

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