Products & Technical Specs

The Industry’s Top Safety Control Products


Pneumatic

Wide range of pressure sensors, relays, velocity checks, and other specialty valves to fit any application


Hydraulic

Extensive offerings of hydraulic controllers, quick exhausts, regulators,

13QS42 & 43 - 1/2" - 150 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

15RS57 - 1/4" - 2-way bleed

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

HLR 7965A HYDRAULIC INTERFACE VALVE

Two (2) way, normally open, hydraulic valve. It is designed to bleed hydraulic supply to a hydraulic reservoir upon loss of pilot pressure.

15RS76 - 1/4" - 2-way pop-top

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

HLR 7960A HYDRAULIC INTERFACE VALVE

Two position, two way Normally Open, pilot supply pressure operated, spring return, hydraulic flow control valve. It is designed to bleed hydraulic fluid to a vented reservoir upon loss of the pilot supply.

HLR 7810-3 MANUAL RESET RELAY (PUSH-TO-RESET)

Two position, three way Normally Closed, panel mounted, pilot pressure operated manual reset relay with a Latch Pin assembly and HLR 8500 Indicator. It is designed to quick exhaust the control pressure whenever the pilot supply pressure decreases sig ... Read more

38 Series Control System

In many regions of the world, actuators exist on wellheads set far apart from any facility or control pressure source other than the well pressure itself. Whether pneumatic actuator or hydraulic type actuator, Sigma takes its own Pressure Sensors, Ma ... Read more

HLR 900-5 SOLENOID OPERATED FLOW CONTROL VALVE

Three Way Block & Bleed control circuit applications. The flow control valve will gain instrument output (operating) pressure upon application of electrical power. The HLR 900-5 is a two position, Three Way Normally Closed, spring return, Solenoi ... Read more

11LV44 - 1/4" - arctic service

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

20HM22 - 1/4" - manual override

The 20HM22 is a two position, two-way normally open, Pilot Supply pressure operated, hydraulic flow control valve assembly. It is designed to block incoming hydraulic Supply pressure automatically when relatively low Pilot Supply pressure is appl ... Read more

11RRS3 - 1/4" - 150 max psi

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

15RS66 - 1/4" - arctic service

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

11RRS87 - 1/4" - panel mount

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

15RS84 - 1/4" - 3-way pop-top

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

HLR 7550A SAND PROBE RELAY

This Safety Manual and Certificate provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Sand Probe Relay with model numbers 7550A. This manual provides necessary user information an ... Read more

13QS15 - 1/4" - 400 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

14KS30 - 1/4" - 10,000 psi

Sigma Check Valves for Pneumatic and Hydraulic Service are available in various port sizes, pressures and operating temperatures. All stainless steel construction means long life and dependability. Based on size and pressure, either Viton Orin ... Read more

13QS38 & 39 - 1/2" - 6,000 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

HYDRAULIC INTERFACE VALVE

This Safety Manual & Certificate provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Hydraulic Interface Valve with model numbers HLR 7950A, HLR 7955A, HLR 7960A, & HLR 7965A. This ... Read more

22US / 22UH Hi /Lo Pressure Sensors High Flow

With five diverse styles to choose from, Sigma Valves offers a pressure sensor to meet exacting requirements for each installation. From standard onshore medium duty wellhead hook-up to the most extreme corrosive well media requirement; for low press ... Read more

HLR 150-18 MANUAL RESET RELAY (PULL-TO-RESET)

Two (2) position, three (3) way Universal Ported, pilot pressure operated, manual reset flow control valve with a Latch Pin and Red/Green Rotowink Indicator. This model is designed specifically to allow for easier than normal manual shut-in (pushing ... Read more

"S" Series

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

72 Series Compact Pressure Sensors

With five diverse styles to choose from, Sigma Valves offers a pressure sensor to meet exacting requirements for each installation. From standard onshore medium duty wellhead hook-up to the most extreme corrosive well media requirement; for low press ... Read more

Model 24RV14 - Relief Valve

Sigma Valves has an extensive line of Relief Valve for Pneumatic and Hydraulic applications. Our Relief Valves are available in a variety of port sizes, port configurations, working pressures and temperature. As with all Sigma products, the co ... Read more

ORIFICE NIPPLES

The HLR 8133 Orifice Nipple has a specific bore diameter of .030”. This type of Orifice Nipple is commonly referred to as a "fixed diameter Flow Restrictor”.

21HA10 - 1/4" - arctic service

Accumulator is a Nitrogen Charge System – Opposed Piston, pressurized hydraulic fluid storage, control assembly. It is specifically designed to store and release pressurized hydraulic fluid within a receiving control circuit.

HLR 7830-DPEXPS STATION

Electric Emergency Shutdown

HLR 950-5 VENT CAP

The HLR 950-5 Vent Cap is a pressure relieving devices designed to prevent accumulation of pressure within a hydraulic reservoir. The Vent Cap will allow gas to escape a reservoir before pressure accumulation can occur.

20HM42 & 82 - 1/4" - status indicator

The 20HM42 is a two position, three-way normally closed, Pilot Supply pressure operated hydraulic flow control valve assembly. It is designed to establish high-pressure hydraulic fluid output automatically with each application of relatively low P ... Read more

11RRS83 - 1/4" - 2 phase

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

15RS40 - 1/2" - cutoff valves

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

HLR 7955A HYDRAULIC INTERFACE VALVE

Two position, three way Normally Closed, pilot supply pressure operated, spring return, 10,000 PSI, flow control valve that has a manual operate (By-Pass) Handle.

13QS1 - 1/4" - 150 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

LPO System Manual

In many regions of the world, actuators exist on wellheads set far apart from any facility or control pressure source other than the well pressure itself. Whether pneumatic actuator or hydraulic type actuator, Sigma takes its own Pressure Sensors, Ma ... Read more

16RS36 - Esd Valves

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

HLR 7550A SAND PROBE RELAY

The HLR 7550A is a two position, three way, Normally Open flow control valve assembly that is manually reset. It is designed for use with the HLR 7620 Adaptor and the HLR 7620 Series Sand Probe Elements.

HLR 7620MR SERIES SAND PROBE ELEMENTS

The HLR 7620 "MR” Series is one part of a two piece Sand Probe companion assembly.

HLR 7970-20M PRESSURE SENSOR

A pressure balance spool control valve used to respond to predetermined pressure settings.

16RS23 & 16RS135 Artic Service - Esd Valves

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

3-WAY HYDRAULIC CONTROL VALVES

This Safety Manual and Certificate provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Hydraulic Interface Valve with model numbers 20HM52 & 20HM24. This manual provides necessary ... Read more

Model 28RG16, 28RG18 Arctic Service - Hydraulic Regulator

The Sigma 28RG2 hydraulic regulator is a two position, pressure reducing (spring/sensing piston modulating combination), flow control valve. Pressure Regulators are typically used to reduce source or instrument supply pressure from up to 6,000 PSI to ... Read more

HLR 7970 HIGH/LOW SET

The HLR 7970 Hi/Lo Set is a manifold assembly with two Pressure Sensors. Together the Pressure Sensors monitor a particular operating pressure range.

20HM27 - 1/4" - manual override

The 20HM27 is a two position, two-way normally closed, Pilot Supply pressure operated hydraulic flow control valve assembly. It is designed to establish internal hydraulic Supply to Exhaust flow automatically with the application of relatively lo ... Read more

TEST NIPPLES

The HLR 8131 Test Nipple is utilized with a "female” base connection Pressure Sensor. The 1/4”-18 NPT connection of the Test Nipple is ideal for installing an isolation valve and field test assembly.

21HA11 - 1/4" - 10,000 psi

Accumulator is a Nitrogen Charge System – Opposed Piston, pressurized hydraulic fluid storage, control assembly. It is specifically designed to store and release pressurized hydraulic fluid within a receiving control circuit.

11LV36 - 1/4" - 3-way - pull top

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

HLR 8620B AUTOMATIC RESET RELAY ("B" VALVE)

Two position, three way Universal (NO,C,NC) ported, flow control valve assembly that is automatic pilot supply pressure operated. It can be employed in multiple purpose applications.

Model 24RV16 - Relief Valve

Sigma Valves has an extensive line of Relief Valve for Pneumatic and Hydraulic applications. Our Relief Valves are available in a variety of port sizes, port configurations, working pressures and temperature. As with all Sigma products, the co ... Read more

QUICK EXHAUST VALVE

This Safety Manual and Certificate provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the quick exhaust valves with model numbers 13QS38, 13QS39, 13QS40, 13QS41, 13QS44, & 13QS45. Thi ... Read more

72 Series Compact Pressure Sensors

In many regions of the world, actuators exist on wellheads set far apart from any facility or control pressure source other than the well pressure itself. Whether pneumatic actuator or hydraulic type actuator, Sigma takes its own Pressure Sensors, Ma ... Read more

HLR 150-14 MANUAL RESET RELAY (PULL-TO-RESET)

Two (2) position, three (3) way Universal Ported, pilot pressure operated, manual reset flow control valve with a Latch Pin and knob. This model is designed specifically to allow for easier than normal manual shut-in (pushing inward) with a Pilot Sup ... Read more

Model 24RV1 & 24RV2 - Relief Valve

Sigma Valves has an extensive line of Relief Valve for Pneumatic and Hydraulic applications. Our Relief Valves are available in a variety of port sizes, port configurations, working pressures and temperature. As with all Sigma products, the co ... Read more

16RS40 - Esd Valves

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

HLR 7620 SERIES SAND PROBE ELEMENTS

The HLR 7620 Series Pipe Element is one component of a typical three piece Sand Probe companion assembly.

HLR 7950A HYDRAULIC INTERFACE VALVE

Two position, three way Normally Closed, pilot supply pressure operated, spring return, 10,000 PSI, flow control valve.

20HM154 - 3/8" - panel mount

The 20HM154 is a two position, three-way normally closed, Pilot Supply pressure operated, high flow hydraulic control valve assembly. It is designed to establish high pressure hydraulic fluid output automatically with each application of relative ... Read more

15RS128 - 1/2" - NACE & arctic

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

12RS6 - Reservoir Vent/Fill Cap

The Sigma 316 stainless steel, pressure relieving Fill Cap prevents pressure accumulation within a Hydraulic Reservoir (Storage Tank). It will exhaust the gas before accumulation can occur, through the spring-loaded cover assembly.

HLR 7790B VELOCITY CHECK VALVE

The HLR 7790B is a two position, two way Normally Closed, Manual reset, flow control, safety valve. It is used to pressurize a pressure monitoring device’s control circuit. Velocity Check Valves respond to downstream pressure differential by insta ... Read more

HLR 7930 PNEUMATIC SAND PROBE RELAY

The HLR 7930 is a two position, three way Normally Open, pressure operated, panel mounted, manual reset flow control valve.

15RS70 - 1/4" - std. service

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

13QS40,41 & 80 - 1/2" - w/spring

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

HLR 7830 EMERGENCY SHUTDOWN STATION (SINGLE LINE)

The HLR 7830 is a two position, two way Normally Closed quick exhaust valve that is manually operated.

HLR 5000 PSHL CONTROLLER UNIT

The HLR 7970 Pressure Sensor is a pressure balance spool control valve used to respond to a predetermined pressure setting. In the Pressure Safety Low (PSL) mode, the valve functions as a 3-way, normally closed, block and bleed control. When used i ... Read more

16RS28 - Esd Valves

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

20HM52 - 1/4" - diaphragm

The 20HM52 is a two position, three-way normally closed, Pilot Supply pressure operated, high flow hydraulic control valve assembly. It is designed to establish high pressure hydraulic fluid output automatically with each application of relativel ... Read more

13QS27 - 1/2" - 400 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

12RS25 - Reservoir Vent/Fill Cap

The Sigma 316 stainless steel, pressure relieving Fill Cap prevents pressure accumulation within a Hydraulic Reservoir (Storage Tank). It will exhaust the gas before accumulation can occur, through the spring-loaded cover assembly.

15RS150 - 1/2" - 2-way bleed

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

11RRS93 & 94 - 1/4" - panel mount

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

20HM104 & 105 - 1/4" - panel mount

The 20HM104 is a two position, three-way normally closed, Pilot operated, hydraulic flow control valve assembly. It is designed to establish high-pressure hydraulic fluid output, automatically with each application of Pilot Supply pressure.

20HM24 - 1/4" - 10,000 psi

The 20HM** Series 3-Way NC valve is a two position, threeway normally closed, low pilot supply pressure operated, hydraulic flow control valve assembly. It is designed to establish high-pressure hydraulic fluid output, automatically with each app ... Read more

16RS18 - Esd Valves

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

Model 28SM2 - Hydraulic Regulator

The Sigma 28RG2 hydraulic regulator is a two position, pressure reducing (spring/sensing piston modulating combination), flow control valve. Pressure Regulators are typically used to reduce source or instrument supply pressure from up to 6,000 PSI to ... Read more

Model 28RG2 - Hydraulic Regulator

The Sigma 28RG2 hydraulic regulator is a two position, pressure reducing (spring/sensing piston modulating combination), flow control valve. Pressure Regulators are typically used to reduce source or instrument supply pressure from up to 6,000 PSI to ... Read more

HI/LOW PRESSURE SENSORS

This Safety Manual and Certificate provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Hi/Low pressure sensors with model numbers HLR 79070 & 72KS43S. This manual provides necessar ... Read more

Fixed Orifice Selection Guide

Sigma Fixed Orifices are available for use in pneumatic and hydraulic control circuits. These 316 stainless steel restriction orifices provide years of positive controlled flow of fluids or gases. Stock orifice sizes are .020 inch and .030 inc ... Read more

Model 28RG20 - Hydraulic Regulator

The Sigma 28RG2 hydraulic regulator is a two position, pressure reducing (spring/sensing piston modulating combination), flow control valve. Pressure Regulators are typically used to reduce source or instrument supply pressure from up to 6,000 PSI to ... Read more

15RS155 - 1/4" - panel mount

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

20SHM10 - 1/4" - piston

The 20SHM10 is a two position, three-way normally closed, Pilot Supply pressure operated, hydraulic flow control valve assembly. It is designed to establish high-pressure hydraulic fluid output, automatically with each application of relatively low ... Read more

11RRS88 - 1/4" - panel mount

Sigma Valves as a company was founded in 1968 to provide a solution to the requirement for a non-automatic reset relay valves in stainless steel. Today Sigma has a wide variety of master relay valves for safety system automation. From basic actuator ... Read more

16R104 - Esd Valves, Stations, & Signs

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

13QS23 - 1/4" - 400 psi - H2S

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

HLR 950-1 VENT CAP

The HLR Vent Caps are pressure relieving devices designed to prevent accumulation of pressure within a hydraulic reservoir. The Vent Cap will allow gas to escape a reservoir before pressure accumulation can occur.

13QS44 - 1/2" - 10,000 psi

SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the ... Read more

HLR 350-10 ELECTRIC SAND PROBE SWITCH

The HLR 350-10 Electric Sand Probe Switch is a SPDT single pole double throw switch that will provide an electrical output to a receiving circuit or device upon erosion of a Sand Probe Element.

20HM34 - 9/16" - manual override

The 20HM34 is a two position, two-way normally open, Pilot Supply pressure operated, hydraulic flow control valve assembly. This assembly has 9/16 High Pressure Autoclave connections at the Supply and Exhaust control ports. It is designed to bloc ... Read more

HLR 150-14AM AUTOMATIC/ MANUAL RESET RELAY

The HLR 150-14AM is a two position, three-way Universal ported, panel mounted, pilot pressure operated, automatic/manual reset relay with a Latch Pin Assembly and a Knob. This model is designed specifically to allow for easier than normal manual shut ... Read more

HLR 7970 HIGH / LOW PRESSURE SENSOR

A pressure balance spool control valve used to respond to a predetermined pressure setting.

Temperature Safety Elements

Sigma Fusible Valves are available in a wide range of sizes, pressures, temperatures and also include several fusible trigger design methods, stacked ball, pop-top, annulus filled to maximize the use of the low melting alloys for precise activation i ... Read more

14KS42 - 1/4" - 2,000 psi

Sigma Check Valves for Pneumatic and Hydraulic Service are available in various port sizes, pressures and operating temperatures. All stainless steel construction means long life and dependability. Based on size and pressure, either Viton Orin ... Read more

20HM20 - 3/8" - manual override

The 20HM20 is a two position, two-way normally open, Pilot Supply pressure operated, high flow control valve assembly. It is designed to block incoming hydraulic Supply pressure automatically when relatively low Pilot Supply pressure is applied.

16RS48 - Esd Stations & Signs

ESD Stations are most commonly found in loop pneumatic control circuits on many offshore platforms. They are normally installed or mounted on platform handrails in strategic locations near living quarters, boat landings, helipads, process faci ... Read more

14KS21 - 1/2" - 6000 psi

Sigma Check Valves for Pneumatic and Hydraulic Service are available in various port sizes, pressures and operating temperatures. All stainless steel construction means long life and dependability. Based on size and pressure, either Viton Orin ... Read more

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Above you have found our core product line that fits numerous applications. In the case of which you are in need of a specific material, temperature rating, or other technical specification, please contact us to see our other offerings we provide to fulfill your needs.

1.

Available Seals: Viton, Urethane, Arctic, Kalrez, Alfas, and Teflon

2.

Exotic Materials Available include: Inconel, Hastelloy, Monel, and Duplex Stainless Steel

Contact Us

sales@sigmahlr.com