MSS SP-70 Gate Valve

This MSS SP‑70 wedge gate valve is engineered for full‑open / full‑close pipeline isolation for water, oil and non‑corrosive gas service. Two stem configurations: OS&Y rising‑stem for visible position indication and NRS non‑rising‑stem for limited‑height / buried‑line installation.
Strictly built per MSS SP‑70, face‑to‑face dimension ANSI B16.10, flange drilling ANSI B16.1 Class125S /150S.
⚠️ Not suitable for flow throttling; partial‑opening operation may damage sealing faces.

1. MSS SP-70 Gate Valve(OS&Y)

• Designed and manufactured in strict accordance with MSS SP-70 standard
• Face-to-face dimension complies with ANSI B16.10 for Class 125LB/150LB.
• Flange drilling dimension follows ANSI B16.1 Class 125LB/150LB specification.
• Working pressure rating: 125S/150S.
• Full cast iron construction available for whole valve body.
• Integrated undivided yoke & bonnet for sizes from 2" to 6".
• Applicable working medium: Water, Oil, Gas.

 

MATERIAL LIST

 

NO.	Part Name	Material	Material Standard
1	Body	Cast/Ductile Iron	ASTM A126B/ASTM A536 65-45-12
2	Body Seat Ring	Cast Bronze/Stainless Steel	ASTM B62 C83600/ASTM SS304
3	Wedge Ring	Cast Bronze/Stainless Steel	ASTM B62 C83600/ASTM SS304
4	Wedge	Cast/Ductile Iron/Cast Bronze/Stainless Steel	ASTM A126B/ASTM A536 65-45-12/ASTM B62 C83600/Stainless Steel
5	Stem	Brass/Stainless Steel	ASTM B584 C86400 B147-7A/ASTM SS420
6	Body Gasket	Graphite
7	Bolts	Steel	ASTM A307 B
8	Nuts	Steel	ASTM A563
9	Bonnet	Cast/Ductile Iron	ASTM A126B/ASTM A536 65-45-12
10	Packing	Graphite
11	Bolts	Steel	ASTM A307 B
12	Nuts	Steel	ASTM A563
13	Gland Follower	Ductile Iron	ASTM A536 65-45-12
14	Yoke Bushing	Cast Brass	ASTM B584 C86400 B147-7A
15	Yoke Bushing Nut	Cast Iron	ASTM A126 B
16	Screw	Steel	ASTM A563
17	Handwheel	Cast Iron	ASTM A126 B
18	Handwheel Nut	Steel	ASTM A563

2. MSS SP-70 Gate Valve(NRS)

• Designed and manufactured in full compliance with MSS SP-70 standard
• Face-to-face dimensions comply with ANSI B16.10 Class 125LB/150LB requirements.
• Flange drilling dimensions conform to ANSI B16.1 Class 125LB/150LB specification.
• Pressure rating: 125S / 150S.
• Valve body available in full cast iron construction.
• Suitable for working media: water, oil, and gas.

 

MATERIAL LIST

 

NO.	Part Name	Material	Material Standard
1	Body	Cast/Ductile Iron	ASTM A126B/ASTM A536 65-45-12
2	Body Seat Ring	Cast Bronze/Stainless Steel	ASTM B62 C83600/ASTM SS304
3	Wedge Ring	Cast Bronze/Stainless Steel	ASTM B62 C83600/ASTM SS304
4	Wedge	Cast/Ductile Iron/Cast Bronze/Stainless Steel	ASTM A126B/ASTM A536 65-45-12/ASTM B62 C83600/ASTM SS304
5	Yoke Bushing	Cast Brass	ASTM B584 C86400 B147-7A
6	Stem	Brass/Stainless Steel	ASTM B584 C86400 B147-7A/ASTM SS420
7	Body Gasket	Graphite
8	Bolts	Steel	ASTM A307 B
9	Nuts	Steel	ASTM A563
10	Bonnet	Cast/Ductile Iron	ASTM A126B/ASTM A536 65-45-12
11	Gland Follower Bolts	Steel	ASTM A307 B
12	Stuffing Box Gasket	Graphite
13	Stuffing Box	Cast Iron	ASTM A126 B
14	Packing	Graphite
15	Gland Follower	Ductile Iron	ASTM A536 65-45-12
16	Handwheel	Cast Iron	ASTM A126 B
17	Washer	Steel
18	Handwheel Nut	Steel	ASTM A563

Select OS&Y if you require clear valve‑position visual check or regular maintenance. Choose NRS for underground installation or low‑clearance vault application. Partial opening for flow regulation is forbidden for both versions.

MSS SP‑70 gate valves are widely applied for: 

• Municipal potable‑water distribution networks 
• Fire‑protection pipeline systems
• Industrial circulating‑water pipelines
• Plant oil & non‑corrosive gas isolation service
• Underground buried pipeline projects
   

Custom Options

• Body material: Cast iron / Ductile iron
• Seat material: Cast bronze / SS304 
• OEM & ODM service available, custom marking & logo support 
• Actuator preparation: can match manual handwheel, gear operator upon request

Our Advantage 

• Complete size range from 2.5"‑24" 
• Strict MSS‑SP‑70 factory test before delivery 
• Technical drawing, BOM and datasheet can be provided for your project submittal.

Q1: Can MSS SP‑70 gate valve be used for throttling / flow‑regulation?
A: No. It is designed for full‑open / full‑close isolation only. Partial opening will cause seat wear and leakage.
 

Q2: How to choose OS&Y vs NRS gate valve?
A: Pick OS&Y for above‑ground pipeline when you need visual valve‑position indication. Choose NRS for buried installation or limited vertical‑clearance vault.

Q3: Can you provide PDF datasheet and 2D drawing for project submittal?
A: Yes, send inquiry with size & configuration requirement, we supply technical documents.
 

Q4: What test will you perform before shipment?
A: Every valve undergoes shell hydrostatic test and seat tightness test complying with MSS SP‑70.
 

Q5: Do you support OEM custom logo?
A: OEM casting marking, handwheel logo are acceptable based on MOQ requirement.