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Check Valves
Protect your systems from reverse flow with our durable check valves. Designed to allow flow in one direction while preventing backflow, these valves safeguard pumps, compressors, and pipelines from damage while maintaining system efficiency. Our selection includes swing check valves, ball check valves, spring-loaded inline check valves, and dual-plate designs, available in a variety of sizes, materials, and pressure ratings. Perfect for water treatment, HVAC, chemical processing, oil and gas, and general industrial applications, check valves deliver dependable performance across a wide range of systems. With rugged construction, easy installation, and trusted-brand reliability, our check valves provide long service life, leak-free performance, and peace of mind in critical flow applications.
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The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.