Isolator R
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| PSI/ Temp Rating | 1/2"-1-1/2": 600 WOG 400 PSI / 250° F 1-1/2"L-3": 400 WOG 275 PSI / 250°F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | 1/2"-1-1/2": Forged brass ASTM B283-06 1-1/2"L-3": Cast brass |
| End Connections | Brass - NPT, Sweat or QuickPress |
| Ball Valve Seals | Teflon |
| Union Seal | EPDM O-Ring |
| Body Tappings | Two Combination P/T Test Valve and Manual Air Vent (CPTA) |
| Ball Valve | Nickel-plated brass ball Optional: Stainless Steel ball |
| Field Repairable Stem | Dual Teflon seals and EPDM O-ring |
Isolator Y
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 1/2"-1-1/2": 600 WOG 400 PSI / 250° F 1-1/2"L-2": 400 WOG 275 PSI / 250° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Strainer | 20 mesh stainless steel |
| Body Material | 1/2"-1-1/2": Forged brass ASTM B283-06 1-1/2"L-2": Cast brass |
| End Connections | Brass - NPT, Sweat or QuickPress |
| Ball Valve Seals | Teflon |
| Union Seal | EPDM O-Ring |
| Body Tappings | Port 1 and 2: Combination P/T Test Valve and Manual Air Vent (CPTA) |
| Ball Valve | Nickel-plated brass ball Optional: Stainless Steel ball |
| Field Repairable Stem | Dual Teflon seals and EPDM O-ring |
Uni-Flange Valve
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 150 PSI / 275° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Ductile Iron ASTM A536-80 Class 50-40-18 |
| End Connections | ANSI 150 Lb. Flanges 2-1/2" and 3" |
| Seals | EPDM O-Rings |
| Body Tappings | 1/4" NPT with P/T test valves |
| Isolation Options | Butterfly Valve |
K Valve
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 1/2"-1-1/2": 600 WOG 400 PSI / 250°F 1-1/2"L-3": 400 WOG 275 PSI / 250°F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Forged brass (1/2" to 1-1/2") Cast brass (1-1/2"L to 3") |
| End Connections | Female NPT (Sweat Available on 1/2" to 3/4") |
| Seals | EPDM O-Rings |
| Body Tappings | Two P/T Test Valve (CPTA) |
| Optional Strainer | 20 mesh stainless steel |
Flanged Isolator R
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 400WOG 275 PSI / 250°F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Cast Brass |
| End Connections | Carbon Steel Raised Face Flange, Class 150 |
| Ball Valve Seals | Teflon |
| Body Tappings | Two Combination P/T Test Valve and Manual Air Vent (CPTA) |
| Ball Valve | Nickel-plated brass ball Optional: Stainless Steel ball |
Combo
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 300 PSI / 250° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Brass alloy ASTM B584 |
| End Connections | Brass |
| Seals | EPDM O-Ring |
| Optional Ball Valve | Bronze/brass 600 WOG |
| Body Tappings | 1/4" NPT with P/T test valves |
Threaded Flange
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 300 PSI / 275° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Gray Iron ASTM 48 Class 20 |
| End Connections | Female NPT |
| Seals | EPDM O-Rings |
| Body Tappings | 1/4" NPT with P/T test valves |
Threaded Mini
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 450 PSI / 250° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Ductile-Iron ASTM A445-70 |
| Cartridge Seal | EPDM O-Ring Optional Viton O-Ring |
| End Connections | Female NPT |
| Body Tappings | 1/4" NPT with P/T test valves |
Copper Sweat
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 250 PSI / 400°F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | 1/2", 1/2"L, 3/4": Brass 1", 1-1/4", 1-1/2": Wrought Copper ASTM B75-66 Type 122 |
Steel Flange
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 230 PSIG / 300° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Steel pipe schedule 40 (with cast iron grooved end clamps on 2"-3") |
| Body Tappings | 1/4" NPT with P/T test valves |
| Assembly | Valve comes fully assembled. |
| Flanges | Flanges are compatible with ANSI B 16.5-1968 150 lb. Steel flanges OR 300 lb. Steel flanges |
Threaded Brass
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 300 PSI / 250° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Brass ASTM B135 |
| End Connections | Inlet: Female NPT; Outlet: Male NPT or Male Hose Bib (NPSH) |
| Assembly | Valve comes fully assembled. |
Grooved End
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 400 PSI / 200° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Steel pipe schedule 40 (with cast iron grooved end clamps on 2" - 3") |
| Body Tappings | 1/4" NPT with Temperature test valves |
| Assembly | Valve comes fully assembled. Test Valves extensions are shipped loose |
Metering Kits
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi Readout | -14.7 -150 PSI |
| Pressure Gauge | 4-1/2" dial |
| Assembly | Kit comes fully assembled |
Wafer and Butterfly
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| PSI/Temperature Rating | 200 PSI / 275° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Ductile Iron ASTM A536 GR60-40-18 |
| End Connections | Threaded End, Slip-On or Weldneck Steel flanges ANSI B16.5 Class 150 or Grooved End |
| Body Tappings | 1/4" NPT with Pressure test valves |
| Butterfly Disc | Aluminum Bronze |
| Butterfly Seat | EPDM |
| Butterfly Body | Ductile Iron |
Wafer
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
| Psi/ Temp Rating | 360 PSI / 275° F |
| Cartridge | AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring |
| Body Material | Ductile Iron ASTM A536 GR60-40-18 |
| Body Tappings | 1/4" NPT with P/T test valves |
| Assembly | Valve comes fully assembled. Pressure and Temperature port extensions are shipped loose. |
Pure Flow +
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
Automatic Flow Controls Meter Kit Flow Verification
Learn more about the operation and installation of Griswold Meter Kits.
Manual Valves vs. Automatic Flow Limiting Valves
Learn more about the differences in efficiency and cost of Manual Balance Valves and Automatic Valves.
How Do I Choose a Cartridge?
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
Installation & Operation Guide
Learn more about the installation and operation of our products.
How Do I Choose a Cartridge?
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.
Installation & Operation Guide
Learn more about the installation and operation of our products.
How Do I Choose a Cartridge?
The Griswold Controls Automatic Flow Limiting Valve is used in many different applications, mostly in the HVAC industry to maintain balance in a HVAC System.