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,
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
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
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
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
"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
HLR 7970-20M PRESSURE SENSOR
A pressure balance spool control valve used to respond to predetermined pressure settings.
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
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
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
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
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
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
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.
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.
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
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
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.
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 7620MR SERIES SAND PROBE ELEMENTS
The HLR 7620 "MR” Series is one part of a two piece Sand Probe companion assembly.
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
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.
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
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
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
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.
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
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.
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
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
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
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”.
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
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
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.
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
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.
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
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
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
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
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
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
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.
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
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
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
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
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
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
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
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
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 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
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
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
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
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.
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.
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
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
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
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.
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
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
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
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
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
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.
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
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
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
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
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.
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
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
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
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
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.
HLR 7830-DPEXPS STATION
Electric Emergency Shutdown
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
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.
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
HLR 7970 HIGH / LOW PRESSURE SENSOR
A pressure balance spool control valve used to respond to a predetermined
pressure setting.
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
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
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
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
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 7950A HYDRAULIC INTERFACE VALVE
Two position, three way Normally Closed, pilot supply pressure operated, spring return, 10,000 PSI, flow control valve.
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
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.
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
Don't See What You Need?
Contact Us Now
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