Metal Seated RS Gate Valve

Valve Type Rising Stem Gate Valve (OS&Y – Outside Screw & Yoke)
Body Material Cast Iron (ASTM A126 Class B / EN-GJL-250)
Seat Material Bronze (Integral or renewable)
Stem Material Brass (C36000 / C37700)
End Connection Flanged (ASME B16.1 Class 125 / EN 1092-2)
Operation Handwheel
Design Standard MSS SP-70 / ASME B16.34 (mod)
Face-to-Face ASME B16.10 / MSS SP-70 (Flanged ends)
Flange Dimension ASME B16.1 Class 125 / EN 1092-2 PN10/PN16
Inspection & Test API 598 / MSS SP-70
Pressure Rating Class 125 / PN10 / PN16
Size Range 2″ – 12″ (DN50 – DN300)

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Description

Technical Datasheet: Rising Stem Gate Valve

(Cast Iron Body / Bronze Seated / Brass Stem / Flanged / Handwheel)

General Information

Item	Standard Configuration	User Specification / Remarks
バルブタイプ	Rising Stem Gate Valve (OS&Y – Outside Screw & Yoke)	Stem rises when valve opens
ボディ素材	Cast Iron (ASTM A126 Class B / EN-GJL-250)
Seat Material	Bronze (Integral or renewable)	Bronze-to-bronze sealing
Stem Material	Brass (C36000 / C37700)	Corrosion resistant
End Connection	Flanged (ASME B16.1 Class 125 / EN 1092-2)
手術	Handwheel	Malleable iron / Ductile iron handwheel
Design Standard	MSS SP-70 / ASME B16.34 (mod)	Cast Iron Gate Valve Standard
対面	ASME B16.10 / MSS SP-70 (Flanged ends)
Flange Dimension	ASME B16.1 Class 125 / EN 1092-2 PN10/PN16
Inspection & Test	API 598 / MSS SP-70
圧力定格	Class 125 / PN10 / PN16
Size Range	2″ – 12″ (DN50 – DN300)
Temperature Range	-20°C to +150°C (Limitation of brass stem and bronze seats)
Stem Type	Rising Stem (OS&Y)	Outside screw & yoke
Wedge Type	Solid wedge / Double disc (Optional)

Design Features

Feature	Description	Benefit
Rising Stem (OS&Y)	Stem rises when valve opens; visible position indicator	Visual confirmation of valve position, threads outside fluid path
Handwheel Operation	Sturdy handwheel for manual operation	Easy to operate, torque multiplication
Bronze Seated	Seat rings and wedge faces are bronze	Excellent corrosion resistance, long life, smooth operation
Full Port Design	Straight-through full bore	Low pressure drop, allows pigging
Outside Screw & Yoke	Stem threads are outside the valve, protected from media	Longer stem life, easy lubrication
Renewable Seat Rings	Seat rings can be replaced (optional)	Extended valve life
Cast Iron Body	Robust, cost-effective	Suitable for water and non-corrosive services
Flanged Connections	Drilled per ASME/EN standards	Easy installation and removal

Bill of Materials (Main Components)

No.	Part Name	材料	Remarks
1	体	Cast Iron (ASTM A126 Class B)
2	Bonnet	Cast Iron (ASTM A126 Class B)
3	Wedge / Gate	Bronze (ASTM B62 / B584)	Solid wedge, bronze faces
4	Seat Ring (Body)	Bronze (ASTM B62)	Thread-in or pressed-in
5	幹	Brass (C36000 / C37700)	Rising stem (OS&Y)
6	Stem Nut / Yoke Sleeve	Bronze (ASTM B62)	Threaded engagement with stem
7	Packing	Graphite / PTFE
8	Gland / Gland Flange	Cast Iron / Ductile Iron
9	Yoke	Cast Iron (ASTM A126 Class B)
10	Bonnet Gasket	Compressed Fiber / Graphite
11	Bonnet Bolts / Studs	Steel (Zinc Plated) / Stainless Steel
12	Handwheel	Malleable Iron / Ductile Iron
13	Handwheel Nut	Steel / Brass
14	Nameplate	Stainless Steel / Aluminum

Technical Parameters & Performance

Item	仕様
Medium	Water, Oil, Gas, Air, Steam, Non-corrosive Fluids
Operating Temperature	-20°C to +150°C (Brass stem limit)
Max Working Pressure	Class 125: 200 psi @ 100°F / 13.8 bar @ 38°C (Derate at higher temps)
Seat Material	Bronze-to-Bronze
Sealing Performance	API 598: Liquid – No visible leakage; Air – Class B permissible
Flow Direction	Bidirectional
Flow Characteristic	On-Off (Not for throttling)
ボアタイプ	Full Bore (Standard)
Stem Design	Outside Screw & Yoke (OS&Y), Rising Stem
Handwheel Rotation	Clockwise to Close
Installation Position	Any position

Test Pressure (Reference: Per API 598 / MSS SP-70)

圧力定格	Shell Test (Hydrostatic)	Seat Test (Hydrostatic)	Low Pressure Seat Test (Pneumatic)
Class 125	400 psi (2.8 MPa)	200 psi (1.4 MPa)	50-80 psi (0.34-0.55 MPa)
PN10	15 bar (1.5 MPa)	11 bar (1.1 MPa)	0.6 bar (60 kPa)
PN16	24 bar (2.4 MPa)	17.6 bar (1.76 MPa)	0.6 bar (60 kPa)
(Note: Tests performed per API 598 / EN 12266-1)

Dimensions & Weight (Reference: ASME B16.10 / Class 125 Flanged)

NPS	DN (mm)	L (Face-to-Face) mm	H (Open) mm (approx)	Handwheel Diameter (mm)	Weight (kg) approx
2″	50	178	280	160	18
2½”	65	190	320	180	24
3″	80	203	360	200	32
4″	100	229	430	250	45
5″	125	254	500	280	60
6″	150	267	560	300	75
8″	200	292	700	350	115
10″	250	330	850	400	165
12″	300	356	1000	450	225
(Note: For PN10/PN16 flanges, dimensions may vary slightly. Refer to certified GA drawing for exact dimensions.)

Flange Drilling (Reference: ASME B16.1 Class 125)

NPS	DN (mm)	Flange OD (mm)	Bolt Circle (mm)	Number of Bolts	Bolt Size (in)
2″	50	152	121	4	5/8″
2½”	65	178	140	4	5/8″
3″	80	191	152	4	5/8″
4″	100	229	190	8	5/8″
5″	125	254	216	8	3/4″
6″	150	279	241	8	3/4″
8″	200	343	298	8	3/4″
10″	250	406	362	12	7/8″
12″	300	483	432	12	7/8″
(Note: For PN10/PN16 flanges, refer to EN 1092-2 standards)

Special Requirements / Options

圧力定格: Class 125 / PN10 / PN16
Flange Standard: ASME B16.1 Class 125 / ASME B16.5 Class 150 / EN 1092-2 PN10/PN16
Seat Type: Integral / Renewable bronze seat rings
Wedge Material: Bronze (Standard) / Cast Iron with Bronze overlay / Stainless Steel
ステム素材: Brass (Standard) / Stainless Steel (304/316) / Bronze
ボンネットタイプ: Bolted bonnet (Standard) / Screwed-in bonnet
Packing Material: Graphite / PTFE / Non-asbestos
Handwheel: Malleable iron / Ductile iron / Cast iron
Test Certificate: EN 10204 Type 2.2 / 3.1
Special Cleaning: For potable water / Oxygen service
NACE Compliance: MR0175 (Requires material upgrade)
付属品: Locking device / Extension stem / Position indicator / Chainwheel / Gear operator (for larger sizes)

Design Notes:

Rising Stem (OS&Y) : The stem rises when the valve opens, providing clear visual indication of valve position. Stem threads are outside the valve body, protected from the media, allowing for easy lubrication and longer service life.
Handwheel Operation: Provides mechanical advantage for easy operation. Standard rotation is clockwise to close.
Bronze Trim: Provides excellent corrosion resistance and long-term reliable sealing. Bronze-on-bronze seats are standard for water and low-pressure steam services.
Cast Iron Body: Suitable for non-shock applications; must be protected from rapid temperature changes and water hammer.
Flanged Connections: Conform to ASME B16.1 Class 125 standards, allowing for easy installation and removal from pipeline.

Application Notes:

Suitable for: Water distribution, wastewater, irrigation, fire protection, HVAC, and general industrial services.
Not suitable for: High-pressure steam, severe thermal cycling, or highly corrosive fluids (consult manufacturer for material upgrades).
Installation: Can be installed in any position. Ensure proper gasket selection for flange sealing.

Note: This datasheet is prepared for a Rising Stem Gate Valve with cast iron body, bronze seats, brass stem, flanged ends (ASME B16.1 Class 125), and handwheel operation per MSS SP-70 / API 598. Ensure selected materials, pressure rating, and trim are compatible with the specific service conditions.

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