Food-grade sanitary diaphragm valve design requirements?

Sanitary diaphragm valves for food, beverage, and pharmaceutical must meet: (1) internal surfaces Ra 0.8 micrometer or better (crack-free for CIP cleaning), (2) dead-leg free design to prevent bacterial growth, (3) FDA-compliant elastomers (EPDM, PTFE, silicone) for product contact, (4) 3-A Sanitary Standard 63-02 certification, (5) full drainability when installed on horizontal pipe, (6) material traceability (AISI 316L body, 316L diaphragm). For Saudi Arabian dairy and beverage plants (Almarai, Saudi Dairy), diaphragm valves with clamp connections (Tri-clamp) are specified. Installation must slope 1:100 toward drain for complete emptying.

ATEX certification for hazardous area control valves?

ATEX 2014/34/EU certification is required for control valves used in explosive atmospheres in EU countries. However, for Saudi Arabian and UAE oil and gas, IECEx (International Electrotechnical Commission Explosive) and ARAMCO/Ethernet protocols are more relevant. Key certifications: (1) IECEx equipment protection level (EPL) marking: Ga (highest risk), Gb, Gc for gas; Da, Db, Dc for dust, (2) temperature rating T1-T6 for maximum surface temperature, (3) flameproof enclosure 'd' for motors, (4) intrinsic safety 'i' for positioners and limit switches. For Jeddah refinery modernization, IECEx Zone 1 certification with ARAMCO 01-EM-0023 approval is required for all instrumentation including control valve actuators.

Home / Products / Control Valves

Control Valves

Name: Control Valves Exporter
Brand: Supreme Valves India
SKU: SV-CONTROLVALVE
Availability: InStock
Rating: 4.8 (2 reviews)

Our control valves are designed for precise, automated control of process variables such as flow, pressure, and temperature. We offer a range of actuated valves to meet the demands of modern industrial processes.

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Product Specifications

Actuation	Pneumatic, Electric, Hydraulic
Valve Type	Globe, Ball, Butterfly
Flow Characteristic	Linear, Equal Percentage, Quick Opening
Pressure Rating	ASME Class 150 to 2500
Accessories	Positioner, Solenoid Valve, Limit Switch

Materials of Construction

Part	Carbon Steel	Alloy Steel	Stainless Steel
Body	A216 WCB/WCC; A352 LCB/LCC	A217 WC6/WC9	A351 CF8/CF8M/CF3/CF3M
Bonnet	A216 WCB/WCC	A217 WC6/WC9	A351 CF8/CF8M
Trim (Plug/Ball/Disc)	410 SS hardfaced	Stellited	SS304/SS316; 17‑4 PH (as required)
Seat	Metal: 410/316 + HF	Stellited	Soft: PTFE/RPTFE/PEEK; Metal: 316 + HF
Stem/Shaft	A276 TP410	A276 TP410	A276 TP304/316
Gland Packing	Graphite / PTFE (service dependent)
Studs	A193 B7	A193 B16	A193 B8
Nuts	A194 2H	A194 7	A194 8
Gasket	Spiral wound SS316/304/321 with graphite filler

Purchase Options

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Materials of Construction (MOC)

Component	Material Specification
Body & Bonnet	Ductile Iron (ASTM A536 / EN-GJS-400-15)
Stem / Spindle	SS 410 / SS 420
Seat / Trim	EPDM / NBR / Bronze

Technical Specifications

Parameter	Specification / Standard
Manufacturing / Design Standard	EN 1171 / AWWA C509 / BS 5163
Testing Standard	API 598 / EN 12266-1
Pressure Rating	PN16 / PN25

Material of Construction

S.N.	Parts Name	Material	Qty
01	Body	ASTM A 351 Gr. CF8/CF8M/CF3/CF3M	1
02	Body Connecter	ASTM A 351 Gr. CF8/CF8M/CF3/CF3M	2
03	Ball	-Do-/AISI 304/316/304L/316L	1
04	Stem	AISI 304/316/304L/316L	1
05	Gland Nut	AISI 304/316/304L/316L	1
06	Gland Bush	AISI 202/304/316/304L/316L	1
07	Lock Nut	AISI 304/316/304L/316L	1
08	Seat Ring	PTFE/GFT	1
09	Stem Seal	PTFE/GFT	2
10	Body Sealant Ring	PTFE/GFT	2
11	Lever	M.S./S.S.-202/304/316	1
12	Nuts & Bolt	M.S./S.S.-202/304/316	-

Testing Details & Standards

Class: 150
Hydro Test Pressure Body: 425 PSI
Seat: 300 PSI
Max Temp: 180°C
Air Test: Seat 80 PSI ± PSI

Dimension Tables

Size	Inch	M.M.	A	ØB	L	SOCKET WELD HOLE
1/2"	1/2"	15	77	13	115	22
3\4"	3\4"	20	81	19	135	26.5
1"	1"	25	90	25	134	34.1
1.1/4"	1.1/4"	32	99	32	165	43
1.1/2"	1.1/2"	40	113	38	170	49
2"	2"	50	132	50	170	61
2.1/2"	2.1/2"	65	136	63	300	76
3"	3"	80	160	75	310	89

Technical Specifications

Design & Exporting

Standard: BS 5351 / API 6D

Testing & Inspection

Standard: API 598 / BS 5146

Pressure Rating

Class: 150# / 300#

Temperature Rating

Max Temp: 180°C - 300°C

Test Pressure Requirements

Test Type	Pressure	Standard
Hydrostatic Body Test	425 PSI (Class 150)	API 598
Seat Test	300 PSI (Class 150)	API 598
Air Test	80 PSI	API 598

Materials of Construction

Part Name	Material Specification
Body	ASTM A351 Gr. CF8/CF8M/CF3/CF3M, ASTM A216 WCB, Cast Iron
Ball/Disc	AISI 304/316/304L/316L Stainless Steel
Stem	AISI 304/316/304L/316L, AISI 410
Seat/Seal	PTFE, Reinforced PTFE, Graphite
Gaskets	Spiral Wound Metallic, PTFE, Graphite
Bolting	ASTM A193 Gr. B7/B8, Carbon Steel

Size Range & End Connections

Size Range:

1/2" to 12" (15mm to 300mm)

End Connections:

Flanged (ANSI B16.5), Screwed (BSP/NPT), Socket Weld (ANSI B16.11), Tri-Clover

Pressure Classes:

Class 150, 300, 600, 800, 1500, 2500

Face to Face:

As per ANSI B16.10, BS 5351

Technical Notes

All dimensions are in millimeters unless otherwise specified
Tolerance: ±3mm for standard dimensions
Complete material traceability provided with mill certificates
Valves tested as per API 598 and customer specifications
Special materials, coatings, and certifications available on request
Gear operators and actuators available for larger sizes
Fire-safe and anti-static designs available on request

Standards Compliance

API 6D

Pipeline Valves

API 598

Valve Testing

BS 5351

Steel Ball Valves

ANSI B16.34

Valve Design

ISO 9001

Quality Management

IBR

Indian Boiler Regulations

Frequently Asked Questions

How to size a control valve using Cv calculation?

Control valve sizing follows ISA standard 75.01: Cv = Q x sqrt(G/(P1-P2)), where Q is flow rate (GPM), G is specific gravity, P1-P2 is pressure drop (PSI). For liquids, use this formula. For gases, use Q x sqrt(G x T x Z) / (Cvx sqrt(Y x P1 x P2)) where Y is expansion factor. Steps: (1) determine max and min flow rates, (2) select a valve size that gives Cv in 80-90% open range at max flow, (3) verify that minimum controllable flow (Cvk x P1 differential) is less than min flow requirement, (4) check that P1-P2 is not excessive (>50% of inlet pressure for flashing/cavitation avoidance). For Saudi Arabian water treatment plants, we provide valve sizing calculations with ISA format documentation for project approval.

What's the difference between pneumatic and electric actuators?

Pneumatic actuators use compressed air (typically 4-7 bar) to rotate the valve stem via piston or diaphragm mechanism. Advantages: fast operation (0.5-5 sec), high torque output, fail-safe options (spring return), explosion-proof for hazardous areas, simple and robust. Electric actuators use an electric motor with gear train. Advantages: precise positioning, no air supply needed, built-in position feedback and controls, easy integration with DCS. Disadvantages: slower operation, potential failure under high inertia loads, more complex. For Saudi Arabian oil and gas, pneumatic is preferred for safety and speed. Electric is used for modulating control with precise positioning or where no instrument air is available.

What is fail-safe position for spring-return actuators?

Fail-safe position is where the valve goes when air pressure is lost in a spring-return actuator. Air-to-close (fail-open) valves close when air fails - used for safety shutdown where open flow would cause overflow or damage. Air-to-open (fail-closed) valves open when air fails - used where stopped flow causes safety issue like pump overheating. Selection depends on process logic: (1) suction side of pumps - fail-open to prevent pump damage, (2) discharge valves - fail-closed to prevent backflow, (3) vents/drains - fail-closed to contain hazards. For Saudi Arabian refinery burner management, fuel gas safety valves are spring-return fail-closed per OSHA and Aramco engineering standards.

How does a positioner improve control valve accuracy?

A positioner receives a 4-20mA signal from the controller and adjusts actuator air pressure until the valve stem reaches the requested position. Without positioner: actuator responds proportionally to signal but friction, spring compression variations, and supply pressure changes cause 5-15% position error. With positioner: position error reduced to <1%. Additional benefits: (1) faster response to small setpoint changes (2) split-ranging capability (one signal controlling multiple valves), (3) reverse/fail action configuration, (4) position feedback for DCS indication. For Saudi Arabian district cooling control loops, smart positioners with HART protocol provide diagnostic data including stem friction trends for predictive maintenance.

What is the difference between PIBCV and globe control valve?

PIBCV (Proportional Integral Binary Control Valve) is a specialized globe valve with a two-stage positioning mechanism: the first stage (pilot) responds to small signals for precise throttling, the second stage (main) provides high flow capacity. This provides: (1) improved sensitivity at low flow rates, (2) better resolution for precise temperature/pressure control, (3) lower air consumption than standard positioners. Standard globe control valves use single-stage actuation where positioner output directly drives the actuator. PIBCV is used in: (1) building automation temperature control, (2) small flow loops requiring precise control, (3) HVAC systems with variable primary flow. For UAE building management systems, standard PIBCV valve types are common.